@labcatgames thanks for trying out the game! A lot of these issues are things we are looking to fix in future versions, unfortunately we didn't have the manpower to work on them within the timeframe, so it'll only happen after the review phase is over and we can push a proper update.
The choice to go 3D with 2D sprites was more stylistic than anything else, and though we do want to play more with the 3D environment, you're right that, for now, it's just a 2D game with a coat of 3D paint.
The turn length especially is something we want to find ways to mitigate. Speeding up the turns with a key press and having them animate faster are two quick wins we'll look into implementing. Also, with more time to add other summons and make the game more varied, the feeling of repetition should go away as well.
Thanks for the thorough review, and hope you come back in the future after the jam to check out what changes we can manage to make!