The Tremor vs Fear/Sleep/Charm is great, and it is raid-wide so you don't care if your team is in three different groups in an IoC or AV.

How much healing do you get from 5x Healing Stream Totem?
I would probably have one shammy glyph that for the resistance to Fire/Frost/Nature.
Is Healing Stream for the raid, or just the group?
I seem to recall Mana Spring did not stack with itself.

The Wind Shear would be exactly like the Mind Freeze.
Or alternatively you could have it target arena frames, if you'll do arena.
Or possibly target your focus.
Or maybe a macro for each, and switch them in as you need one or the other.

I really like 5 minute Fire Elementals.
Do they hit for so much, or does it scale off of spell power?