That was the point.
To create an average guy, a normal guy.
He isn't as handsome as Brad Pitt.
He isn't as talented as Ronaldo or Federer.
He isn't a macho as Randy Savage.
He is just a normal guy that is trying to find his way in life, nothing more.
As for the appearance, M, S and GM all have similarities in their appearance and personalities.
The MC obviously takes after M regarding his personality and he and S are, as she says. "Two peas in a pod".
But, appearance wise, he inherited that from his father and some traits from M's father.
(As Elle21 already said here above.
)
So, in my eyes... there is nothing to fix.