The game plays in a way that feels overly melee centric, as ranged options feel restricted by almost all having a one turn cooldown. But because you can't move past friendly units it makes the game frustrating since you have to waste movement to move around them, and this draws out combat at times. Plus, why have ranged units at all if they can't, you know, be ranged all the time?
The TF system also feels weird. Beyond the feeling that the game doesn't seem to know if it wants to embrace the adult content or not though it; the fact it basically just swaps out a unit for another unit with no reflection of the unit's true abilities also feels weird. Like it would make sense if they were corrupted into an enemy unit, but wouldn't it both be hilarious and interesting if the dwarf musketeer now slime girl had both the slime abilities and used a musket? It actually would help with the musket needing a cooldown like in my previous point.
It's a fun TF game and I always love those. But as a game itself the design feels odd.