OK, so we were all waitin these changes, and i have to say that, at this early stage, they are quiet a delusion.
There are things that looks good, like hand of guldan, bane of havoc and imp hellfire, but in the end the new way talents work hampers enormously possibility for customization and create some personal way to play your character.
in the end, u have a max of 2 build per spec, at least as things look like now, they're tryin to sell us the "we cut off boring things", but in my eyes they're just simplifin the game to be more simple for them to balance and leave players with fewer choices, wich is the opposite an expansion should do.
Also, there are very ugly design behind some hinted mechanics, like SF in destro, or very very very stpid immolate refresh from HoG at nearly the end of demo tree.
I know this is an early stage, but from the direction they're takin, it seems they're goin to cut more then what they give in terms of deveopment depht, and doesn't seem they have a clear plan about it all ( some time ago we were expecting new talents, ability to spend in 2 trees a lot more, path of titans to add depht to end game etc...everything got cut) to make room for simplicity for them to balance/develop.
It's not you make a game grow 5 years and then say "it was all wrong, we're goin to make all different", expecially when Blizz was working in the very opposite direction for more than a year.
This is beta, truth, but the 31 talent trees is bad design, here just for designers to have simpler work, and, to the very end of any market, the customers should be the ones you're expected to work for, not employers, and you do not make a 39 bucks game expansion to be here for employers to work easier..