I guess better is pretty subjective. Bowie made 17 threes total in 4 years of college basketball, but did shoot 33.3 % at ISU. You are correct though. We shouldn't be expecting him to be 20 and 10 guy. Unfortunately for him and prohm, that is what we need.
Johnson doesn't need to be a star for next year's team to be successful -- defining success as making the NCAA tournament. I would hope.
Bolton, Young, and Conditt need to be stars. One or two of the freshmen having a nice season, in the vague range of TH as a freshman, would help.
Johnson needs to be a good role player. It is the returning guys that need to shine.