The main reasons Pennsylvania trended Republican in 2012 are the voter suppression laws and the voting machines that flipped votes to Romney. Someone had a video up on YouTube that showed the machines flipping their votes.
They probably will be on the books still, but if the next governor and attorney general are Democrats, they might not be enforced.
PA already has a Democratic AG and it's pretty likely they will have a Democratic Governor next year as well. The only way I see to repeal these laws is through the legislature and that requires flipping both chambers which is unlikely. Don't know how they can just not enforce these laws I think what's more likely is whoever is Gov will try to work with Republicans to try and loosen the restrictions.
