I'm wondering when you get dual spec (i'm a druid) on my primary i'm mostly feral with 0/2 on imp motw and on my secondary i'm 2/2. If I buff myself with motw while my secondary is active then reactivate my primary do I keep that buff? Or does it downgrade.

I have not tried this but I believe the buff will stay... I have noticed that switching specs does not remove/refresh current buffs on you so it would be as if a druid with that improved buff cast it on you. (not tested though)

Hmm... does it seem that's like one of blizzard concern... are they going to change it any time soon, or it's not even discussed.

I just tried it, it does change your buff it doesn't remove it