the solution for a faster gear up has already been suggested and I remember Malaco said he was thinking to take it in consideration but then nothign happened (if I remember correctly)
I am talking about the idea of making 3vs3 flush separated.
So player can do 10+ arenas on 2s (or soloq) AND 3s
This will increase the activity of 3s and at same time making players gearing up faster