It's not about guarantees, or even starting spots. Not even about who will be better.
It is about projected or likely minutes.
We have 4 guys expected to earn 20-32 mpg at 3 spots. You could make a case for 2 more (Sheppard & Theiro) to get a little run, say combined 10-15mpg. To add another guy who would be expecting at least 20mpg, there just aren't the minutes unless 1 of them ain't playing or 1-2 of them play A LOT LESS than expected.
And I am not one of those who always think 5* players will start or play a lot. I correctly called Collins not contributing much (when everyone else thought he would). I correctly called Boston overrated bust before he ever walked on campus. I correctly predicted Whitney to struggle. And I fear Bradshaw may struggle too (as a FR). But I think Edwards will be our best FR since probably Fox/Monk/Bam. And I think Wagner and Dillingham can at least be as good as Tyty, Maxey & Wallace.
Sure, we would gladly take Dingle. But would he want to come if there is a big chance his minutes could be anywhere from 10-24 mpg? When there are lots of good schools with bigger holes, and he could believe he would be in the 20-30 mpg range.