I'm exclusively talking D1 Trenton. The difference between DII, DIII and DI is that, yeah, you will get to the NT in four years, maybe three, I've experienced it, but you need to move up... so you will need four more years once you moved, then you get knocked out in the first round. It's not that easy.
Anyways, just saying logically, a coach would not keep bad players, would work on transfers, get enough players that are talented to sign etc.