You can base the weight of votes on POW. Yes AVA coin is PoS. Whatever this you are saying is speculation. I think Avalanche is awesome but I'll leave if BCH becomes PoS.
Good point. However, PoW-based avalanche is more complicated, and it does not allow miners to come and go arbitrarily as they would surely lose trust.
I don't think Avalnche becomes any more complicated if it relies on PoW, or PoS. It is it's own consensus form, and is independant of the PoW done by miners.
maybe loose trust in avalanche yes. but remember that avalanche is solely going into effect if there is a conflict.
