the aoe heal for paladins i've heard isn't so good. probably just not in arena, definitely not something you should depend on. auras working on the entire raid group is a pretty sweet buff. ret aura becomes the primary aura for ret paladins (makes sense amirite?). sanctity aura becomes sanctified retribution, making ret aura give 2% damage to anyone affected by it, and later in the tree is a talent to make it so anyone affected by ret aura also gets 3% IAS. and as a bonus, ret aura does a bunch more damage and is affected by spell damage to a degree. Improved Devo aura also makes it so anyone affected gets bonus healing, and the armor bonus is bigger.
edit: actually, rereading beacon of light, it's possible that the heal will stack. cast on multiple people, and turn each of them into a walking healing aura. though, it's possible that it's not like so as well: only works on one target, can't heal the same person with multiple beacons, etc. Not really sure. The idea of the paladin making multiple people into healing auras could be pretty crazy though...
for the new abilities, the shield slam looks pretty nice, especially since paladins get a lot of block value on their gear. alliance finally get a seal of blood equiv, but seal of command may be better in the expansion after all. With Sheath of Light, AP will finally affect judgment of command, and anything else that was originally only spell damage. With a whole bunch of buffs, and a stun, it can do pretty outrageous damage though:http://chuckg.org/dump/2008/workingasintended.jpg
Granted he has great gear and all his natural buffs up, but that's a bit insane. It's likely to get toned down.
All the trees are insanely bloated. Good and bad: roles are more specified, but it's hard to get a good hybrid build working. Now it is necessary that you respec for different environments (pvp/pve). This is probably the pvp tree i'll work with.http://www.worldofwarcraft.com/info/cla ... 3104201351