I just had a pretty bad experience in PvP where the other team did not want to leave their graveyard I am guessing because one team was significantly more powerful than the other leading to the other team giving up and just standing at their graveyard.
From the perspective of someone who is standing at their graveyard waiting for them to do something… Well… There is nothing else to do apart from ensure that you win and wait for them to either fight back or just continue sitting there doing nothing…
A good solution to this would be to add an empower buff which ONLY is active at the graveyard of the given team FOR ONLY that given team. The empower buff could double their damage giving them an escape route in situations where the other team has forced them back.