You can find all the update for paladins with abilities and talent trees on this page.
Main change for Holy Paladins is the healing spells we will have at our disposal:
- Holy Light ( lvl5)
6% of base mana, 40 yd range, 3 sec cast
- Flash of Light (lvl16)
27% of base mana, 40 yd range, 1.5 sec cast
- Divine Light (holy talent tier 3)
30% of base mana, 40 yd range, 2.5 sec cast
- Holy Shock (lvl 40)
8% of base mana, 20/40 yd range, Instant cast, 6 sec cooldown
So Holy Paladins are now on the same model as priests, we have a medium relatively slow and mana efficient heal (Holy Light), a fast but very costly heal (Flash of Light) and a slow costly but big heal (Divine Light). We still keep our instant heal that will be the same size as a Holy Light for nearly the same price (that makes it very very valuable mana wise especially with Holy Mending that adds a 15% hot on the target of Holy Shock at lvl 80+).
These are the major changes to our gameplay that I see. Even if the holy talent tree has changed a lot the core talents are still here and the gameplay should be relatively unchanged.
As for the fears we had about BoL, it is now only duplicating Holy Light and Holy Shock ... as I see them as our two spam heals I don't think it'll be too bad.
See you later for more comments on cataclysm holy when more news come out.