Again, the only reason why I prefer FieldTurf over the current DD system is because of the amount of play the field gets.
If Pittsburgh treated their field with the same reverance that the Packers did and allowed nobody to play on it, I'd be completely cool with a 100%, home grown grass surface. Ideally, that's the way the game should be played.
Limit non-Steeler use and get a better tarp/coverage system for foul weather and they're golden. Neither one will happen though.
I think that's the essential point, aj. There's only so much you can do with the Pitt games, but the PS knows when the WPIAL is going to have their playoff games. They certainly can request that there not be a home game that weekend. It's not unusual; heck, the Giants and Jets obviously coordinate schedules, also Oakland and SF rarely have a common home date. So it's certainly possible to accomodate the Steelers for one game.