Here are some ideas that I think would make the game even better.
Let both Hunters and Monster select 1 or more advantages like the ones on evacuation at the beginning of each quick match. That alone will make the game much more varied and it will add more strategy to the game from the start.
Unlock all characters: For a paid game with no campaign I think is a very big error not to allow the players have access to all the characters from the first moment, as it just makes the game much more repetitive, even online where most people will play with the same freaking characters simply because everybody starts with those characters, specially when unlocking them is so goddamn slow ( also people will start ranging a bit less about all the DLC deal ).
EDIT: Never mind, now I get it, you need one star on each ability, I thought you needed 3 stars on each ability to get the next character.
Modes with more Hunters and Monsters mixed, like 8 players versus 2 monsters, or teams of players and monsters combined.