The main problems with the PP are:
1) The system and PP coaches, it's horrendous for the talent we have. Why the hell do we have a bumper, why isn't Landy in front of the net, etc.
2) Landeskog - Love the dude, but he single-handedly kills so many plays it's ridiculous. Either a misplaced pass, a puck bobble, or just a stupid-ass play usually means its an easy out. There's very few passes that Landy gives that can be moved quickly or one-timed, and as a result it usually gives time for the defenders to reset.
3) Passing - I don't know if it's the way our PP is set up or what, but there are very few crisp passes that can made into a high percentage play or chance.
4) The bumper player - The bumper player hasn't done jack all the entire season. It was nice when we had Duchene/ROR/etc. who would go down low on the half-wall and create a seam to the bumper guy, but our PP doesn't do that anymore. Usually the bumper results in a turnover or weak percentage play because the short passes are too awkward to do anything else with
5) Rantanen - He was money on the PP when he was shooting, for whatever reason he's not as much and his passes aren't tape-to-tape either.
Girard isn't going to fix the PP because he'll just be thrown into whatever garbage PP system we're running. It was decent with Barrie because his shots got through which usually resulted in a deflection or a scramble, knew how to setup a one-time pass for both Rantanen and Mack, and he had great awareness to know where to go after a scramble.
For whatever reason, both Girard and Makar aren't able to set up those one-timers the same way Barrie did.