At the very least, this will give some accountability to his actions. He must confer with his own party, knowing that these pardons may cost his party the election. The populace has a way to protest these actions by rejecting his party come election day. It would allow for a check on this power. Realistically, it won't happen.
Pardons are an important power for both parties.
I don't expect them to do what is right, just what is politically advantageous. This is how Washington works. A Presidential pardon is one of the most powerful tools any President has. I just wish they would use it more responsibly and not as a means to free their unethical friends. I don't think it's too much to ask.