Our feral tank(who never specced balance) has it, but none of the other druids in my guild can train it. They've all been balance at one point or another, so I think the bug is related to the talent ability versus the new baseline ability.
I'm pretty sure IS bug is the same one that was on beta. If you were spececd Moonkin and it was on your bar before the patch, you should have it when the patch it. If you didn't.... then you're out of luck until they fix it.
This was similar to Beta where if you copied your character from live you had to be moonkin spec with IS already trained otherwise it wouldn't appear on Beta. The moonkin spec had to be your current active spec.
Update on the raidwide Rebirth CD: It currently seems random whether you can use it more than once during an encounter. On live today the cooldown was triggered while doing HDeathwhisper, but not while doing HLK.
Similar with beta apparently.