[Omnimorph]

Pretty sure this is as it's intended. Normal melee always has a chance to interrupt you when casting, i don't know the formulae involved, but it will go against your channeling and some other things probably.

Frontal stun immunity means just that, you won't get stunned ("you have been stunned!"), but interrupting your casting is still possible (I mean, you're an ogre for christ's sake! someone flashes you something shiny should interrupt your casting...)

At higher levels with higher channeling you can probably channel through alot more, where as a darkelf enchanter i can still get stunned by greenies :/