Well I was pretty down in the dumps about Disc, still am, and I still much prefer Disc's playstyle, but I switched to Holy for PVE and then tonight with 5 people doing AB's decided to try out Holy for PVP, and it's actually pretty damn fun/good!
Lightwell can pump out a LOT of healing in a small group which is battling, Circle of healing and PoH also do really well, and the Echo HOT can actually be surprisingly good. If you die, freecasting flash/Gheal for nearly 30 seconds is just a dream too!
I was annoyed that even WITHOUT the bubble/Aegis, my Holy priest lived a LOT longer evenw hen being trained, due to LW, HOT's, COH's and Chastise+Inner Will to get a little distance. Us 5 did about 6 AB's and won 5 of them, and it was the most fun I've had in Cat PVP so...even if you don't like Holy like i didn't used to, give it a go =) Was sceptical, and I'm not a HC PVPer or anything with insane rating, but it's fun
(Not sure how to post thumbs, so here are the links, feel free to edit it to correct the thumbs, or let me know how to post thumbs, thanks )
http://i53.tinypic.com/2meaghz.jpg
http://i55.tinypic.com/majy9i.jpg