I think the whole reputation score needs to be replaced with something like User Authority. (Sorry, I'm on my phone so I can't find a good link yet) you can see what that is in some of the posts I've written and resteemed. If you're interested I can find you a good link later.
Basically it scores you based on who is voting for you. If several people just upvote each other they will have a lower score than someone who is voted on by more reputable people. (Simple version to give you the idea)