I think party should be cut for all players above level 20 EXP.
At this level they should be able to fight against the current monsters without die unexpectedly.
We should think about
new ways to promote team combats. I would prefer some new monsters or caves with monsters getting killed by teamwork only.
Concerning the god switching:
I would like to see a ritual. If somebody will switch his god, he have to do a ritual to leave his current god. That could be building a kind of relic related to his god, or a dance mask he have to craft and that needs to be use for an amount of online hours till his god lets him go. And the same thing is needed to worship a new god.
The crafted things disappear after use.