I agree that Guard play is what lights the fire, but I also have to say Zach was a different breed of post player. Without Zach, how many do we win? Do the Boilers reach the final game?
I see a different style of team this coming season, and in my response I'll deal with only the players returning. TKR/Furst/Berg can all play the post...or the 3 or 4. I think all three are interchangeable in those positions and I don't see us losing much at all with either. With all three on the court at the same time, with Loyer and Smith at the guard spots, I see a team with the returning guys like Heide (who can also start) and hopefully Myles coming off the bench to provide energy and relief for the five I mentioned.
I don't get all wound up about incoming players that haven't seen the floor in a college game, but my guess is that at least two will contribute big time.
PU will finish no lower than 3rd in the revamped B10, and will IMHO, see the Elite 8 and with the right draw, the FF.