I approve of the OP's group composition!

Mine is close:

Dwarf Paladin - Protection
Draenei Mage - Arcane
Night Elf Druid - Balance, some Restoration (for mana regen and Master Shapeshifter)
Draenei Shaman - Elemental
Human Priest - Holy, some Discipline

Same account as Druid:
Human Warlock - Destruction

I argue that dwarf vs. human is a very close call. Don't second guess yourself later on, you will be fine either way. It's rare that you'll use either Stoneform or Every Man for Himself, as it is.

I'm happy with the group composition... and yeah, you have a ton of buff stacking going on in the group.