First off I love enhance and it's the only reason why I am here to give some thought regarding the spec. I have chatted with many enhancement shamans and we pretty concerned that the spec has the highest risk factor going into the expansion.

2 issues we have to come to terms with is:

1) We don't bring unique buffs to the raid anymore.
This means you could potentially take another melee dps instead of a enhance shaman especially with encounters where enrage timers are a problem initially and you want to get that kill in before your competition guilds.

2) The unintended consequence of the dismantling of a lot 25 man raiding guilds into 10 man raiding guilds.
As a raid leader why would you take a enhance shaman over any other class/spec with all things being equal. Eg skill for skill/gear for gear.

I do trust things will balance out at 85, but if we going to pay the hybrid tax surely ferals/rets/fury wars and dks
should be paying the same taxes?