I would love 1v1's in Monster legends to be a thing, where people don't have loaded bases with a ton of op monsters, you could sit back, relax, and use whatever you wanted and actually have fun. No energy or ranking system should be implemented with it, save that for the ranked pvp. The private matches should have no rewards and more for testing monsters.
Another idea I have is the ability to add friends outside of facebook. To my knowledge, the only way to add friends is through facebook.
If there already is a seperate way, thats great. What I'm getting at here is that the game should be more socially interactive, like an MMO, to make you feel like your not alone. Global chat shouldn't be the only way to interact with others when you're bored.