I'll try to avoid spoilers.
While I get where you're coming from regarding Medb, I think you really should have realized Medb is a "long game".
Elves kidnapped MCs father, are at a brink of war with Templars and, as far as MC knows, tried to kidnap him as well.
It simply wouldn't make sense to have Medb show him around, or be his guide through Neverwhere.
Kaibitch has been around MC his whole life, she's "familiar territory", so she's best character to introduce MC to new life.
And that is also why Linnae forces them to have the big conversation. Simply put, to save his father they need to, even if MC decides never to forgive her, put hatred aside and learn to work together.
That's why I loved seeing "We work together. For now" option.
MC didn't forget, he just wants to rescue his father.
Working with someone who kidnapped his father and tried to kidnap him would make no sense at all.
Not to mention MC, currently, is a no-one in the eyes of Elves. Or was, but that's spoiler territory.
I will comment on Sandstorm/Snowstorm comparison, only by saying it's not the same. That game throws MC into a new life completely, and he chooses which clan to work with. This is not that. MC still lives in his everyday life, it's just turned upside down.
As for branching, I dare say this one has plenty of it, and with fairly significant differences depending on who you romance/befriend/hate. Chapters 1 and 2 are full of choices which lead to completely different scenes in different locations.
0.4 is the weakest in branching regard, but it makes perfect sense.
MC needs to see Neverwhere. Who can guide him there? There is literally 1 option for that.
And based on how your relationship with Kaija is, there is no handholding (disgusting), there is no saving random guy, no romantic scene on rooftop, they don't walk together through forest. MC is a job and she's doing it.
I believe we'll see ton more of Medb, but so far there was simply nowhere to use her that would make sense.
I do have a save where Medb is primary LI, but that's for when it happens in the future. Also allowed checking some side women, boss at work, girl in a bar etc.
I actually don't agree that that Kaija was the only option to show MC around Neverwhere.
Sure, she was the "familiar" territory to him, but assuming we're going with the whole "MC doesn't trust Kaija after keeping the whole Templar thing a secret and also felt they were drifting apart" scenario i.e. Medb or any other non-Kaija LI paths, why couldn't other characters have shown MC around?
Like for example, Linnae? She was set to take the fall for MC and Kaija's little excursion to Neverwhere anyway in Kaija-solo path, so she could have been the prime candidate to show MC around; and her trying to justify to other Templar Masters that "MC needed to know" and resigning the same.
That, I'd say would have been a far better alternative, than playing the scene with Kaija doing the showing around Neverwhere which plays out pretty much almost identically as when player is going through the Kaija-solo path.
And yes, Kaija showing MC around Neverwhere, laughing and smiling while teaching him the basics makes 100% sense in her own path, but it makes much less sense (given she acts the same) if the player isn't pursuing her.
It just made things seem a bit weird, given they had an argument in the templars office (after Linnae's orders), and unless the player suddenly turned a 180 degrees from friend-zoning to choosing "Oh I changed my mind, I wanna take you back."
I'd say if the player chose to just friend-zone Kaija, and wanting to stay on that path, there should have been some sort of choice as to who can show MC around Neverwhere.
As for Medb can't be the guide and show MC around Neverwhere, lol of course not.
But that doesn't mean a separate branch couldn't have been created for those on Medb-solo path; I can already think of one example which is the following;
Linnae shows MC around Neverwhere (no Kaija, she's locked out as option, assuming non-Kaija path lol), and while they're at it, MC becomes separated from Linnae due to factors beyond her control.
MC wonders around, somehow finds Medb and the elves.
He tries to hide, yet Medb finds him and starts to interrogate him (some decent dialogue between the two, maybe some info dump and chance for more relationship points for Medb), Linnae finally finds them and tries to intervene.
However, Hellspawn arrives and things start to turn into chaos.
Linnae tells MC to hide, and the rest unfolds exactly the same as Kaija-solo path's version of it.
Just that with Medb solo path, it fleshes it out some more (as well as more dialogue with Medb) whereas with Kaija-solo path, MC and Kaija arrives to help Medb while the elves were in the thick of the battle.
Only thing that matters is the whole MC saved Medb's life and her owing him a life debt leading to her releasing MC's father.
There could have been a lot of meat on the bones added (and it doesn't even need to be what I wrote above. Just anything, as long as it aligns with leading to the expected conclusion, where the branches end) for Medb's arc with this update with more stuff added which is exclusive to her solo-path.
As for Sandstorm and Snowstorm, well I did state the story and characters are different.
But even so, GleenX is currently doing a really good job with the branches atm, how each LI's arc, diverges with branches until eventually converging, which is what I wanted to point out.
Regarding the whole "long game" aspect, sure. It's clear Medb is a much more of slower burn LI, compared to say, Kaija. But I initially wasn't sure of how long of a game that
Ceolag has got planned for this.
If he only planned an entirety of 10 chapters for this, then most likely I would be getting pretty concerned.
But taking a look at the thread's OP, it does say "Book 1, Chapter 4."; meaning at least 2 Books/Seasons worth of storyline.
No idea how many Chapters will there be per season, but even so.
I'll give you that one, heh.
EDIT:
Book 1 (game 1)will be around 11/12 chapters and will tell the story of the current MC to a certain point.
Book 2 (new game) will have new (and old) characters with a different MC and a different story.
Actually, reading this, I am back to being pretty wary now
Book 2 with completely different story and new MC (and likely new LIs) will mean MC's arcs with LI will need to be all wrapped up within the planned 11~12 chapters of Book 1.
Which means, we're already nearly halfway
(considering 5.5 or 6 chapters is halfway mark, it's close enough).
My personal hope is, with Medb-solo path, in the future it allowing players to explore locations (such as Elves' forest residence) exclusive to that path, and those locations being locked out if player is on Kaija-solo path (and Kaija solo path having its own exclusive places not available on other paths).
Otherwise, if too much content overlap between path, all there's gonna be is a lot of ctrl fast skip on those second playthrough paths lol.
Not sure whether Ceolag is thinking of this or not, but I hope.
Somehow, this turned into a big ramble from my end lol