My quick take is as follows:
We are very poor in primetime games in recent years. Playing the majority of games at 1pm on sundays gets players in a habit of sorts. Throw in the fact that it will probably be the first REAL away game this year, as Pittsburgh is in a playoff race and tickets are scarce at the moment (I know of many fans going to Dallas).
Having said that, getting a national TV game will be great experience for 17, 27, 49, 88 and other young players as the playoffs near.