Yeah this bracket is going to be in an interesting spot come next patch but there is a light at the end of the tunnel.
We will return to how it was in 5.1 - when the bracket was growing every day, however everyone gains an extra 100k~ hp making the problem of burst from that era not such a problem.
I can see most classes staying at 85 because the secondaries would be really strong, however if you go up to 87 chasing that new spell, you will still maintain your 65%~ resi making level 87 more appealing.
I'm pretty excited for ~2 patches time when it's all fixed up.
So the options appear to be stay at 85 for bigger secondaries but be forced to stack some resil to make up for the base resil gap.
Or go 87+ and just gear the hell out with MoP gear and pewpew?