I have been trying out the open beta.
And I must say, it's looking really solid. Say what you will about Acti-Blizz's dehumanizing practices and pro-profit attitude, but they always seems to nail the atmosphere and world-building.
Builds are definitely a step-foward in comparison to D3. As Critical have pointed out, skill trees are actual skill trees, advancing in different skills leads to another. Unlike the lite-RPG skill trees like the ones found I Ubisoft games. While I heard some players were expecting PoE-level of skill tree paths, I personally think this version is less overwhelming. Skill Respec is easy to do on the spot, and I always welcome RPGs that does this, as it allows experiment at any time, and in case you botch builds.
Maps and dungeons no longer being randomly generated is a blessing for me. I get why some people might like randomly generated areas, especially those into more recent roguelike games, but I personally could never stand this in D2. I KNOW what I'm supposed to find, but I could spend 5 min, 30 min, or even an hour just to find the specific dungeon I'm looking for, enter it just to find the area randomized everytime I boot up the game. ALL THAT is gone. Holy crap, I can actually explore areas without looking into every corners now.
Everyone getting their own set of loot is amazing. I think this is what made me never want to co-op in D2. Everyone would work their asses off trying to beat a tough boss carrying each other through the battle, but when it's time for the loots they turn on each other. It's what made me not wanting to co-op the borderlands series either. Everyone having their own loots eliminates that fight for them, and we can be more civil and asks for trades.
Combat is great, but difficulty spikes seem to come from a horde of demons attacking me at once, or few tanky ones that are nothing more than bullet sponges.
And because this is beta, there were some technical problems as well. Textures loading in a few seconds late, game lagging and slingshotting me, random drops, etc.
Overall, yeah I am hyped for the full release. Not pre-ordering, though