Played a little bit more yesterday. Got a couple levels with my Warrior, and tried a Defiant Bladedancer/Nightblade/Assassin Rogue. Still very low level with both of them.
More on Abilities
The soul trees are pretty interesting. Generally, each tier has about 5 "soul-specific" talent points, and 5 "generic" talent points. That way, if you don't use the soul-specific abilities, you can still climb the tree by investing in the generic talent points.
So far, what I've found is that about 70% of the abilities I use come from the primary soul, about 30% from the secondary soul, and I use one buff or one ability from the tertiary soul.
AoE looting is amazing! You loot one dead mob, and all the surrounding dead mobs you can loot are looted at the same time. All the items appear in one window, and is essentially treated as one transaction.
This change is definitely worth stealing.
Rifts are random events that occur fairly often. A portal opens, and enemies spew out. There are several waves, and the UI tracks your progress much like a Public Quest in Warhammer. There's a little contribution meter that tracks your participation, and when the rift is closed, you get a loot bag containing some random items. Mostly special currency to purchase gear, but also crafting items and some sort of trophy items that you collect sets of. Don't really know what you do with the trophy items.
As well, when you first enter the rift area, there's an option to join a public group, and you get dropped into a raid with other people.
I rather like the rifts. They're random, which makes them a nice break from solo questing. You do your quests, see a rift form near you and join up and beat down the rift. Then you go back to questing. It's a nice change of pace that doesn't require a lot to set up or even a great deal of commitment.
I think it might also make healing and tanking a little more attractive. You get a small dose of group content every so often, which is your main purpose as a healer or tank, and you don't really feel the pressure to go DPS to make questing easier.
Now the downsides of rifts is that, so far, they are essentially a giant zerg. There's not a lot of tactics or strategy involved. But then again, this is low-level, and things can change at higher levels.