I tried out a dumpster fire in Beta. Very tough. You will be limited to 3 walk-ons, the reset will be auto-signed. Auto-signed recruits appear as signed by "SimAI". However, unlike cutting recruits that you signed, that means that they may be rescinded at the beginning of recruiting period #2 and you will receive additional resources (AP & Budget).
Also, remember that on the final cycle, all recruits at your level will have scholarship unlocked. So, you may be able to keep a narrow focus and risk taking a couple auto-signs. Offer 1 or 2 scholarships in the final cycle (with no other resources allocated), but don't feel the need to avoid all possibility of auto-signing. The next season, you will still be able to keep a narrow focus, then rescind a "sim" signee and receive more resources in period #2.
Still, new resources in period #2 are worth far, far less than in period #1. You might still be able to sign senior x'fers, but they are hard to locate.