I thought Ghouls were designed well. I mean, they look far more "realistic" than there earlier counter-parts in the past games in my opinion. Also, mole rats are probably different species on the East and West coasts, and the Mr. Handy models were probably different on both coast's as well (Mr. Gutsy only appeared in Fallout 3). As for the power armor, I agree with you.
So it's all going to be explained by "Screw it, since it's on the east coast they have the right to do what they want"?
No.
Bad solution.
Different models, different species, well then don't call them molerats and don't call them mr handy's if they're not by the original design.
A molerat is a big rat looking thing with brown fur and no tail and (IMO) a rather fat ass. Whatever that thing in fallout 3 was it wasn't a molerat.
But whatever, as I said, I hope they get things right in fallout 4 or at least explains why that thing is different.
As for ghouls, what do you mean by realistic? (If you do reply then I'll have to reply to it tomorrow, going to bed now.)