Hi there here is a small list of suggestion that could be easily change:
Event : If the mass dominion define the time of event that will be proposed in the future, despite I find that very disappointing, the contract and objective should stick for a bigger part to the event.
Contracts:
avoid contract like finish X game without dying more than 5 time...It create 2 situation that are really gamebreaker. one is AFK people and waiting to the end to respawn. The second is running shoes heroes playing really dirty. Why not a kill X target in a round instead ?