"Mobility is still pretty low, heals are still interruptable, and the only big new trick is Beacon of Light, which doesn't work if we are out of line-o-sight of the beacon."

This is absurd. Paladins needed increased mobility. This can't be argued. But they needed to nerf our healing effectiveness to compensate, which they didn't do. Holy paladins have become THE dominant healer in 2's again due to Infusion of Light and Beacon. They can simply run around spamming Holy Shock on themselves with beacon on their DK partner, pop an instacast Flash when it procs, and if things get hairy they use their stun to get enough time for a nice 18K Holy Light (x2 due to beacon, of course.) I play as ret and can go in my full PvE DPS gear into an arena and focus fire a holy pally and he never gets below 40%. It is very difficult to drop 20K worth of burst onto a paladin within 6 seconds as ANY class, and if you don't, yyou won't kill him. You also can't FF his DPS partner since his heals are so amazingly large and fast. mana efficiency is still the best around per spellcast, and arena matches right now rarely last long enough for him to even need to pop Divine plea anyway.

TL;DR version: Holy pallies are as mobile as druids with bigger heals, most of which are instacast or almost instacast at this point. Saying they lack mobility is just crazy.