I like GW in its current state, for the most part. Sure thay could stand to move it away from its Diablo roots (since GW is basically Diablo 3) with better AI, more cinematic cutscenes, making better use of the instances, etc., but the game is fine.
The increased level cap does not sound all that good as I hate level grinding and I say just ditch levels entirely. The instancing is fine by me but like I said earlier I wish they would take advantage of it to do some more cinematic things. Like blowing up a bridge or other level altering events. The heroes could stand to have a little more personality and definately must have some better AI. As for new racesm who cares? The furries can go yiff-off in other games and dwarves/elves suck due to overuse.
The lack new classes must be due to balancing and art creation issues. All the armor sets they have to create most cost a furtune in time and labor. Trying to balnce ten plus classes also is a pain. More is not always better.