It's more a boon for the alliance than for the horde. Paladins were never that powerful (or fun, really)... I'm interested to see how they'll change many encounters, since the main reason against giving horde paladins/alliance shamans before was that certain encounters became too easy if there were both paladins and shamans in the group.
I haven't played wow in a while, but my friends have been telling me of plans for inter-server battlegrounds and stuff... Might make me dust off my warlock and start playing again.