These are all awesome suggestions! 

I like the idea of adding non-debuff skills to the enemies so they aren't overwhelming the player with status effects...because, yeah, I can see how it'd start to feel like, "What's the point in removing this debuff?"

I can also see what you mean by the MP color. I'll fix that!

An immunity-granting skill is an amazing idea. That's going in, too.

Thank you for the helpful feedback. :3