who cares if we redshirt someone? the staff should be recruiting someone as good or better to replace him. the lines may be slightly different but you are still recruiting guys as good or better.
It's extremely hard to recruit an 18 year old kid to replace a 22 year old kid who has spent 4+ years in the s&c program, and being coached by college level coaches. Most 18 year olds arent going to walk in and from day 1 be able to hang
then one would hope they arent just recruiting kids to start for 4 yrs at a time. if you are recruiting players equal to or better than the players you have, redshirting them to keep them for another year becomes a moot point. you're not going to just have a two-deep at every position. take lamar jackson, some say we should have redshirted him. no, they just signed a lamar jackson to replace him and are actively recruiting another lamar jackson to replace him. so even if he plays limited downs it doesn't matter because you have the replacement ready.
and truthfully,
we should only expect players to be here for 3-4 yrs. if they are good enough they'll be heading to the nfl in that time frame.