I watched part of Purdue's exhibition - I went in thinking they could still be a top-25 and possibly Sweet 16 team, came out thinking they aren't. Sorry. I don't think it's going to happen for Purdue this year. Painter would have to do a masterful job to get this team back to the Sweet 16.
When they lost Hummel last year, they still had a very good senior leader in Kramer, and they had a quality senior guard in Keaton Grant who moved into the starting lineup. Now the replacement for Hummel is gone (and none of the possible replacements has had the career that Grant had prior to him being put in the starting lineup), plus they have to replace Kramer as well. Purdue this year is IMO like a Ponzi scheme - they look good now because they're rated highly and they haven't played anyone for real so no one has had a close look at the books, but they will collapse when the going gets rough. I think OSU, MSU, Illinois, Minnesota and Wisconsin will all finish ahead of Purdue this year.