Just cancel the sub, see if 4.1 makes the desired changes and if not I dont think you will be the only one heading to a different game. Best thing to do imo, besides sharing your concerns on the forums. Even make a post on PF telling people to voice concerns in the forum. Nothing will change without a active discussion.

Some people roll deeps, others tanks, and others heals. Not all play styles interest people and some people only enjoy one specific roll. From a DPS perspective I dont see too many things that couldn't be fixed with easy tweaks (correct me if im wrong). From the other perspective there are entire play styles that just dont fill what people wanted from their roll anymore.

Only time will tell, but it would be funny to see the queues get longer. I'd laugh really hard. I know I wont be queuing into DF for a while and that really is the best satisfaction i've gotten out of my roll so far.