Newbie changes have been huge. You know have class definition from very early. Before the change, to-be necro and to be conjuror were exactly the same.
Since the change, they are significantly different, plus, grouping them together (currently unlikely pre-mid 20's) will add significant diversity to the group buff and dps wise.
After the new betrayal rules go in effect, from a practical standpoint, you can mix evil/goods much sooner and with some diversity benefit.
As far as the server mergers went? I'd give the first one maybe a high F. Timewise it tood a long time, they screwed the pooch on shared bank transfers, duplicating and triplicating (maybe worse for those who figured it out early) items.
Post merge lag was intollerable. I think its bug related and not population related...and therefor fixable. If its gona be like this from now on, there will be enough leave to fix the problem.
A big plus, those folks on Befallen were really nice welcoming us Faydarkians....PEOPLE MAKE THIS GAME.
I think thier biggest mistake was trying to do all this at once. A significant live update, mergers, PVP intro, and an expansion all in a 10 day period? Thats askin for trouble.