I do understand your points, but the thing about the tfs is, first of all, supposedly they're putting a big emphasis on combat with multiple difficulty settings. Each and every tf stat change etc would require balancing with the rest of the game. Yeah it falls under "too much work" and I agree that's a pretty poor excuse, but it'd also lead to gravitating towards tfs you don't want because they fit your kit or becoming upset your preferred tfs aren't that good stat wise. You might not do that, but if you're playing with a combat system and care about it at all it'd probably happen for a good amount of people.
To me this is either a really shitty excuse to get out of doing more work or just shows they don't understand what people want. Who on God's green earth actually wanted this combat system that they had to rework to not be terribad? It's not even good still, you just spam every ability off cooldown and smack the shit out of the enemies when you cant use abilities. Add on to the fact that they haven't increased the level cap while admitting the KM underground is intended for Champs above the level cap, I find it really hard to believe they care about the combat past just being not frustrating. Doubly so because combat doesn't integrate well with the rest of the experience at all.
Take Karryn's Prison or Tower of Trample for example. Those have to have good gameplay because the porn is baked directly into the combat itself. They work together to enhance each other. This game, that isn't the case at all. Combat is a nuisance that isn't difficult or rewarding and just takes you out of sexy fun times until you get to the victory/loss scene. TiTS and CoC manage it well enough because there are actually things to think about and the combat contributes to the whole vibe of the games: Everything is out to get you, and it's up to you to make sure that doesn't happen. The world couldn't give 2 shits if you became a corrupted mess in those games and actively tries to turn you into that.
So how does CoC2 combat handle that? Uhh, there are some random hobgoblins, some random horse-chick that wants to fight you, a random mushroom lady?, some kitsunes who wanna suck your soul out, a random earth elemental, etc. You get where I'm going with this, right? All the enemy encounters in this game just seem like they're there for no real reason. It doesn't feel like you're fighting against the corruption, championing savarra, when you're fighting things that aren't even corrupted 90% of the time. You could say TiTs is a little guilty of this but at least that game can fall behind the veneer of "Well this game is hardly even serious most of the time." and it still feels like it adds to the experience, even if only slightly.
Idk man, I just don't get the reasoning behind anything the devs do, honestly. This game really just feels like everybody's fanfic character stitched onto the corpse of a game. I really would love to just sit down with one of them and have an honest discussion about this stuff, I'm genuinely curious what they have to say. Hell I'd even take TOBS at this point if he wasn't an insufferable prick about it. But I doubt that shit's going to happen so I'll just be stuck here wondering why.

Shoutout to the devs of Tales of Legendary Lust who did exactly that when I posted a review of their game. They were wonderful to talk to, wish these devs had their attitude towards criticism.