I think we're done with the majority of classes, barring nip/tucks and balancing issues. We might see a few revised subclasses or alternatives offered, but there isn't much left for the rogue or wizard to test unless they somehow bombed so badly they have to redesign them from the ground up. The only classes that need major work done are monks, bards, and warlocks, and maybe paladin if "use 2014 smite" isn't the fix they opt for.
I want the spell balancing UA already. We got two packets left and there are too many broken or awful spells that haven't seen any work.