Sorry, but i have to disagree. The scenario as I presented is not anywhere close to realism. And if I could play my starters in the regular games, and then my backups in the scrimmage...I would love that! In real life, you have practices, trainers, drills, B leagues, specific coaches etc to work with guys who might not get a single minute of game time.
What I am frustrated about, is that in this last game, my starters played all buy one minute of the game. if I start them again, I risk this happening again, and my starters will be at 94 minutes for the week, and my backups will be at 2 minutes each for the week. Now, I if that happens...I have hurt the game shape of my starters, and am forced to play my backups the entire scrimmage with no backup so they get their 48 minutes. In that scenario I have two exhausted PGs, and only 2 trainees with significant minutes. If this were real life, and real substituation patterns were happening...My starters would get 35-40 minutes...and my backups would get 8-13 minutes a game. IF this happened, I would end up with my starters at 70-80 which is probably still too many minutes, and my backups 16-26 after two games. In this scneario I could start the 26 minute guy, and play another trainee with no backup. So I'd end the week with two guys 70-80, two more guys 48+, and one more guy 10-20 minutes.
Again, there is no scenario that is realistic to me in which I need to be concerned that playing my starters is a bad thing.