Skeletor doesn't have to be a buff dude tho. Even just a lean guy would do since he's a skeleton.
Um... not really? I mean, he has a skull face, but he's definitely no skeleton. That's like calling Trap Jaw a robot.
Yeah, but I can imagine a version where Skeletor is redesigned to be more skeletal, to radiate fear and horror with more emphasis on his wizard powers as opposed to physical prowess. He knows there's no way he can beat He-Man in strength so might as well intimidate with magic.
Hey yeah, a bigger Channing Tatum would make a good He-Man too.
He can be reimagined as one, sure, but until then, saying he "is" a skeleton is inaccurate. That's the main thing.
And hey, they'll do what they do, but I kind of like this warrior body with no more than a skull for a head. It's unique.