I don't like that Hunters switch to melee attacks (from ranged), when a target gets too close.
Melee attacks break auto follow, which can be a pain in the ass.
Not sure if this is a concern in MoP, with Hunters using Ranged weapons in their main hand instead of a weapon.

I personally like an all caster team.
The shaman (elemental) totems, all directly benefit casters.
Some of those totems could benefit melee/ranged classes too, but not while the caster totems are currently in use.

Hunter CC, is a bit harder than other classes... since you have to fire the trap (ground-target) at the target, or place it in advance.
The other classes target something and likely set focus, and CC @Focus.

I do have a Hunter team, and like the class somewhat.
But not as much as another caster, when everyone on the team is basically casters... or a caster/part-time-tank.