To begin with, I love this game and hate it too. It is because every game that I have played which has over 100+ players there is always been someone whose a Pay to Win player (GM's user) and has used a lot of GM's to get a strategic upper hand while they are not great at making strategies.
I suggest the following:
1) A map with players who can not use GM's and only rely on their strategy.
2) A map where everyone is free to play and use GM's.
I believe this would make the game personally fun to play and not make players leave or ghosting their games.