You mean like missing out on Biggie? Wait, that didn't happen. Okay how about missing out on Newman, wait that didn't happen either. Gillis? Nope.
Just because he doesn't land who YOU want doesn't mean he missed or can't recruit. There is a good set of players on the current roster and coming in to make us a solid TEAM. Also let's not forget it wasn't long ago that Purdue wasn't even a mention on some of the lists and that has changed.
Carsen will be watched this entire season by recruits to see how things have changed from a center-focused offense to one that is more fluid, high flying and dynamic. That is what all the new rules want and Painter clearly is adapting to that style.
It is far ... far too early to be abandoning the ship when there is a shift currently going on. Sit back, think about it logically not emotionally and you'll see it.