In my opinion, 5.2. will nerf us even more. Jab, Renewing Mist and Soothing Mist cost more mana, Soothing Mist also grants less chi. Enveloping Mist will become nearly useless for tank healing, not saying that it was a good tank healing before, but why would one want to nerf it even more? There are only 2 buffs against those nerfs. First is that the mastery spheres now heal when they expire, this change was already planed for 5.1. but was somehow taken away some days before it went live. It will buff our healing slightly, but as we don't stack mastery anymore and as the spheres should mostly be used in a good raid anyway, it won't be huge. The second buff is chi burst. Its healing is doubled and will be incredibly powerful, especially in 25man. Anyway, you can't say how good it will be as long as we don't know the mana costs, because it will definitely not be for free.
Therefore, if these changes would be final (which they are not), then it'd all depend on the mana cost of chi burst.
Edit: There are two versions of patch notes on the mmo-champion page. Read the first one, but as the second one states that chi burst will have a 30 second cooldown, it might truely not have any mana cost, but it's also more of a small cooldown than a spammable ability then. So right now I don't know which of the note versions are right or whether it might be a combination of both of them. This is the one (
http://www.mmo-champion.com/content/...TR-Build-16408) where some of the nerfs I mentioned are listed.
For example:
Enveloping Mist healing and SP scaling reduced by 35%.
Renewing Mist now costs 6.5% of Base Mana, up from 5%. Now will heal any friendly target, rather than just raid and party members.
Soothing Mist mana cost slightly increased. Now grants a 30% chance to generate 1 Chi, down from 35%.
So if these changes are all true, the following patch will nerf us once more.