There's one main difference between boomkins and ele shamans. Boomkins Are insanely strong for AoE. Which will be devastating for pugs, but the damage is probably healable if you got some good dedicated healers. Where ele's focus is single target burst.

I think that is what makes the classes what they are. If you get the burst 4 x you can instagib people very casually, where i wonder how a boomkin will deal with 2-3 good healers.

There's no doubt boomkins can be extremely fun to play, especially vs pugs.