If they're going to make hybrids able to adjust on the fly, it means they nerf any point of specializing, so they wind up as gimpy, shitty jack of all trades classes. I'd really like to see hybrids (well, pallies and shamans) able to do more than just their main spec without a shitload of gear though. They need to make some trees potent enough to back up with another role like balance/resto druids (as in going balance and rest of your points into resto). Every class should have 2 viable roles at least, depending upon talent spec. i.e. enhance should be capable of more than just melee DPS, elemental should be capable of more than the occasional impressive lightning bolt/chain lightning crit, ret pallies should be capable of more than the occasionally big burst DPS, and so on. That extends to the DPS classes too, although really the only one that doesn't have another role is rogue. I guess they can CC with sap, but it's not as utilitarian as hunters/mages/warlocks (mobs have to be out of combat, can't be reapplied in combat, doesn't last as long as sheep, etc.).
I mean, there's theoretically at least 2 roles available to nearly every class right now:
Warrior - Tank/DPS
Rogue - DPS/CC
Hunter - DPS/CC
Mage - DPS/CC
Warlock - DPS/CC
Priest - DPS/Healer
Shaman DPS (caster and melee)/Healer
Druid - DPS (caster and melee/Tank/Healer
Paladin - Tank/Healer (ret is seriously pretty much solo DPS, it just doesn't have the sustainability to contribute in most cases)
But the CC roles for the DPS classes aren't affected by talents, and in the case of the bottom 4, their roles are extremely restricted by their talents (and in the case of warriors, they don't lose a whole lot in their ability to hold threat, just in their ability to survive). In the case of my pally, if I weren't Holy spec I wouldn't be able to significantly heal through a dungeon. I'd just be an off-healer at best. I had the same problem going elemental or enhance on my shaman, and then likewise if you go with a healing spec you really can't do DPS/tank (in the case of pally) at all.
If they'd at least put in talents that make healing/tanking/DPS a little more efficient while also upgrading the tree's main focus for shamans/paladins, that would go a long way. There's still a few abilities I feel like they should give to shamans/paladins from their current talent setup (mostly either the crappy 1 pt. talents or the near-required 1 pt. talents, like BoK and BoSanctuary, Mana Tide, 2h weapons, ToW) but they should really look into adding stuff like reduced cost on healing spells in with reduced cost on elemental spells, increased holy damage along with increased healing, elemental clearcasting affecting heals too, that kind of stuff. There are so many awesome, not overpowered at all, buffs/talents that stack with resto in the Druid balance tree that it's just insane comparing it to elemental/holy/ret.