I had this issue pretty much resolve itself yesterday and I have no idea why. We had been fighting in the goblin camp the day before, and when we started the game up yesterday to finish, it was just better. I don’t think we restarted the game or anything. I initially thought it was because we were fighting indoors, but we had been trying the same fight the night before with all the issues. Plus it was still fixed after we went outside. There’s no freezing between character swaps anymore, and summoning freezes the game for about 5 seconds rather than 30. No idea why it fixed itself.