Thoughts on the combat after giving it a try:
1.) I definitely agree with the other people who posted here that you should have at least a 3 person party. I personally think even a 4 person party would be a good idea, especially if the MC is going to be a mandatory member. More choices about how to construct your party (once you have enough characters added to make those choices possible) will help a lot in making the entire rest of the game more interesting.
2.) The amount of resources being managed in combat is currently way overkill. Do all of your skills really need to be gated behind, Energy, Arousal, AND a cooldown? The game you are drawing inspiration from - Darkest Dungeon - doesn't need any of these. Skills are balanced enough by the opportunity cost of spending your entire turn to use one. I think you could compress all of these down to one single resource, or even cut them all. It would be much more intuitive, easier to balance, and would let you clean up the fairly absurd rainbow of different status bars underneath each character.
3.) When it is one of your character's turns, you are presented with an insanely long list of different skills to choose from. However, the majority of these are either really generic, have really expensive activation requirements, or are way too niche. Again, you could probably take all of the different single-effect skills in the game right now and compress them down to give every character a mostly unique set of 4-5 skills that feel better to use. Like, instead of Soraka having the generic "Assist" skill, her single-target heal should automatically assist its target in addition to healing them. You could combine the MC's "Kick" and "Haste" to make "Swift Kick", which would deal a little bit of damage AND apply a speed buff. Stuff like that.
The rest of the game is too early to offer much feedback on, but I like the direction it is headed. It seems you are designing it in a way that will let you pump out a ton of content once all the basic systems are in place, so I am looking forward to how it progresses.