I've always wondered why, at the end of signings, the Sim teams don't scoop up most of the players left who didn't get signed. Granted, they aren't very good (obviously, or they would have been signed), but they've GOT to be better than the walk-ons the Sims get stuck with.
The ONLY positive I can see with Simmy taking on all the walk-ons is if a human coach decides to try a rebuild, they'll have plenty of open schollies right off the bat instead of all those leftover players who couldn't find a home. I'm sure most coaches would rather have the open spots than a roster full of garbage. Of course, since most of the worlds have a lack of human coaches, I don't think you'd run into that problem too often. And even if a coach did pick up a team full of leftovers, he could always cut a couple for a season or two to get them off the roster anyway. Seems like an easy fix with not much of a downside, if at all.