This is like what Diablo 2 was to Diablo. I can't believe how much they improved and added. The new classes are really interesting and I can customize a character instead of playing some cookie cutter WOW style build. Fucking hats off to these guys, they out Diablo'd Diablo 3.
So what kind of changes did they make to the skill tree since the beta? The beta tree was kind of boring because most of the upgrades were just like +5% to whatever. Yawn. I hope they made it more interesting since then.
It's been completely revamped and redone, its a ton of different abilities and all of the trees on the Engineer I picked looked really fun and interesting. They rehauled a lot of stuff after the feedback from beta and fixed all of my complaints. It is really like a proper Diablo game now.