I did a rough comparison to try and get a sense of which routes had more or less content. For that, I just searched for the symbols that YedaGames uses in the walkthrough and counted the number of times they appeared in the document.
One thing that becomes apparent almost immediately is that tossing the Bimbo route seems to lock you out of a ton of content. Not a fan of "bimbofication" myself, but in light of this finding, I may consider exploring that side with Blake
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Since references to each route are not strictly divided between sub-routes, I added route references and sub-route references as a grand total per route, to try and get a better sense. I know this isn't an exact measurement - sometimes sub-route references come just after the route reference and should really count as one. I don't think it happens very often, with one exception that I noticed: in Iris' route, when the walkthrough explains the sorting process between the true and NTR routes, IIn is mention 7 times and IIt only once. So, to allow for a better comparison, I subtracted 6 from the IIn count. It was the only case I saw something like this in the walkthrough and it seemed like it warranted an exception. In all other cases, it's just plain totals.
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Lets you confirm that the Bimbo route does seem to have a ton of dedicated content. Main LI routes predictably have more content than secondary LI routes, but Iris seems to actually have more content, by now, than Liam. I love it, as Iris is a favourite of yours truly, and hope Yeda will never make her a main route either, as I enjoy the compatibility with all of the main routes except (understandably) her sister's. It's also apparent that Iris' true route, at the moment, has a lot more content than Iris' NTR route.
I wonder,
YedaGames , have you considered merging the NTR with the true route, making it a side-kick of Iris' if Blake earns her true route, but accepts the occasional cucking? I say occasional because, by the quantity of scenes, it seems like it can work like that. Those scenes would then not be an independent route (which currently makes all the true route scenes unavailable) but an extra, depending on Blake having accepted some form of open relationship with Iris. It could be a fair deal, since Blake does have many opportunities to cheat on Iris and she seems to only mind it when it involves Jasmine.
Sorry about the long post. These charts and figures are probably worthless for those who don't know the game already, and I seriously question their usefulness altogether unless you're like me, and aim for a playthrough with as much "stackable" content as possible.
There are some other characters that aren't minor at all, that aren't reflected on these because they don't have a particular "route" (Rebecca, Kushari, Zoey quickly come to mind). I suspect Zoey alone has more content than Bree, but I may be wrong. And it seems like Bree has a lot more content on the non-sexual route than on the sexual route, which makes me also wish that we could stack that non-sexual route with Iris' true route (wonder if it's an easy fix one could do with the Universal Ren'Py Mod). Also Dominique's content seems to be, at this point, exclusively in the slave route (whatever the future may hold for her enemies).