I have the impression that Snake-Eyes was supposed to be the coolest of the GI Joes. Ninja plus never talks. Doesn't always follow the rules or the plan. Dresses in black and carries swords along with his guns. He just seems to tick every coolness box. What did you think of him?
Yeah he was the big bad mystery character for some time.
I think the Marvel/IDW comic it wasn't that he couldn't talk so much as he rarely did. I remember one time Scarlet was apparently dying and he did speak her name.
Plus there was the question of his face, was it wrecked? was it repaired and wrecked again?