They don't look much different than some old Fallout concept art.
While I agree with your point, you chose a bad example to illustrate your thought. Yes, the ghouls look... mostly like what we've seen from the talking heads. Kudos to that.
That said, in the same way they dumbed the supermuties to orclike bodybuilders, and made the BOS into Lawful Good paladins... I doubt whoever's responsible for these choices will keep Mighty Beth's generic-o-matic shrinkrays away from the Ghouls.