I enjoyed the game a lot, but oof, really not into the whole route split stuff. Specially after looking under the hood a lot of content is just made inaccessible for virtually no reason when you are forced to pick.
Enjoyed dom dynamics with character A and sub dynamics with character B? Too bad, you are now either a siren or a kitten and you need to go with the specific assigned version of every relationship and every scene.
Not interested in pairing up the MC with a certain character for story reasons but would enjoy seeing them featured in more sexual content even with other characters? Well too bad, it is an all or nothing cuck route. If you take the cuck route you get excluded from most potential relationships, if you don't take the cuck-route you need to gobble up every character into the MC's harem or say goodbye to ever seeing them in a sexy scenario again.
I know having set routes can make it easier to organize the game's writing, but at least so far I'm not seeing any advantages to the route-setting choice over the old "opt-in/opt-out" system the game had early on. If you were overwhelmingly submissive the game would start auto-picking sub route choices, if you were overwhelmingly dominant it would start auto-picking dom route choices, and if you were in the middle threshold you'd get to choose for the routes where both options were possible.
The cuck choices were also pretty telegraphed so I don't think it was warranted to quarantine all of them to a single route where you are forced to only have them (specially since they range from completely harmless to fairly brutal).
Splitting the routes only made me less excited about playing the game because now I know I'm getting locked out of content I was looking forward to, the game's writing and characters were solid enough that I was excited about potential developments in all 3 directions, and now I know you can't mix them during your playthrough.
I know there is no such thing as a "canon" route, but at least as far as it came to Ashe's development in the early chapters, I feel like you can't fully excise from her character some elements of her "kitten" persona (because introvert and traumatized) and "cuckqueen" persona (because insecure pornfiend). But being saddled with those issues are what made the "siren" moments all the more precious, because it was Ashe standing up at the moments where the player decided it really mattered. By splitting the routes, the dynamic is either made worse or at the very least removed from the player's control.