Allen Robinson, WR has probably had the most impact as far as a new player is concerned this season. Also, Brandon Mosby-Felder has improved his route running and impressed lately, taking catches away from Robinson. In addition, Kyle Carter (day-to-day) at TE has really stepped up as a RS Freshman along with Jesse James (true FR TE).
While I'm not saying that PSU will win, the PSU offense and their playmakers are completely different than the PSU-Neb game last year.