There are many differing expectations for this off-season within the fan base. Most agree that RayD emerged as a natural leader of the team, and will be responsible for the maturation of this team. I am in this camp, as RayD has been my favorite Boiler since he stepped on campus. I recommend you follow him on twitter, he is constantly tweeting about working, getting better, and restoring Purdue to basketball glory.
A couple days ago, he tweeted out the video of 11th ranked Purdue beating 2nd ranked OSU at Mackey, the game where E'twaun went bonkers. He said he watches it every day. I believe that Ray is just as passionate about Purdue basketball as us fans are, and that's not always true about college athletes at universities across the nation. Ray has NBA dreams, but he realizes where he is and is determined to make the most of it at THIS university with THIS team THIS year.
I don't think that next year is "on Ray." There are so many parts of the team that need to improve to be competitive in the B1G. That being said, I do believe that Ronnie was harmful to Ray's ability to lead the team. Ronnie was the point guard, the same class as Ray, and a more consistent contributor. Now that Ronnie is gone, Ray will be the elder statesman that the freshmen look up to. He will be "the guy" and represent what it means to wear black and gold. For the next 2 years, his teammates will always know that their leader is fighting, clawing, yearning his way to improvement as a person, player, and teammate.
I'm not saying that Raphael Davis will lead us to the NCAA tourney next year. I'm not saying that he will lead us to a deep tourney run the year after. All I'm saying is that I'm certain he believe he will, and I wouldn't bet against him. Keep faith in this team. Keep faith in your fanhood. Cheer hard, and remember that you cheer for a program that not everyone can understand because it is special in a way that is better measured by floor burns than final fours.