They need to be careful not to make disc too over-powered though. If you think about it, if all the Priest issues were taken care of (survivability, mana, extra healing) then they'd actually be the easiest healer to play in the game and probably the best.
The combination of 30sec CD Phantasm (fade) heals, 45sec Aura Mastery heals, ontop of clearing your focus every 30sec with spectral guise (night elf priests will be super aids again) then if all else fails, just swap hp instantly and LoS heal yourself... it's all way too basic and easy to play.
So then if disc is able to take glyph of swd and fear ward for every relevant game if the baseline changes go through, they're going to be even more difficult to CC, not to mention instant CC's getting nerfed (rightly so too) but it does directly effect how much easier healers will be to play.
It's going to be a really fine line between making discs "viable" and them being stupidly easy to play and overpowered for sure. The whole easyclassmode shield + immunity heal your target was really silly in cata in the first place, now they have a whole bunch of easy-class abilities to use in arena, people just don't realise it yet because of how bad disc is right now.
See this is unrealistic prediction, let's say priest gets paladin/shaman level healing, it doesn't mean anything. There is still no reason to bring a priest.
You don't have bop, you don't have freedom, you don't have an interrupt, your cc is irrelevant because of totemic restoration and 2 million year cast time of your oneshottable psyfiend, that is also instant fearable by paladins. You can't break cc of your team mates, bop blind / tremor and so on. You don't have damage.
On top of everything, the class has the worst survivability/mobility and is meant to be soloed by melee by design. So not only you don't provide a single utility to your team mates , you are a burden to them.
Disc was r1 viable because we had good cc, good damage, good dispels. Now we have worst cc among all healers, worst dispel (can't decurse and everyone removes all debuffs) and worst healer damage.
So, don't worry about disc becoming overpowered, unless they add a cc/interrupt, buff dmg by %200,add a couple of team utility spells and nerf every other healer, this will never happen.
Edited by Djandawg, 13 January 2013 - 05:18 PM.