This is why I hesitate to promise starts OR minutes except in very extreme situations. (Like I'm in a battle for a recruit and low on funds)
Aside from the fact that a 1st year player isn't going to play as efficiently as returning vets, you're sometimes caught in a crunch where the guy may not deserve more minutes, or a start, but you're already committed.
My first season in HD, I had a guy I promised minutes to and quickly discovered that I hate gameplanning by Target Minutes. Of course, I didn't know what I was doing then (still don't, not really) but it became apparent that I was playing a couple of my low-Stam guys so much they were wearing out before the end of the game. Switching to Fatigue makes that aspect easier to handle and I just accept the consequences of assigning "Fairly Fresh" to a guy I don't want to play 30 mpg.
I'm in this situation right now, though. I promised a ranked recruit a start this season since he was so much better out of the box than my returning center, and I'll take my lumps with foul trouble and botched plays until his IQ goes up. I plan to set him to "Fairly Fresh" in combo with "less aggressive" on fouls so he will come out earlier on foul trouble. I'll take whatever comes from that.
Why can't there be an option below "Fairly Fresh" that isn't quite "Mop up"?