That’s exactly the kind of band-aid move that’s made them a QB wasteland for the last 30+ years.
The answer is to draft QBs until you get it right. Draft QBs even when you already have a QB you like or are trying to build. The Jags drafted Minshew in spite of just signing Foles. The Patriots drafted Cassel, Brissett and Garappolo even though they had Brady.
Pace’s biggest mistake was not drafting Mitch, and it wasn’t going all-in before Mitch proved he could handle it. His biggest mistake was not drafting middle round QBs (or even signing UDFAs) in the intervening years so that you at least have a couple lottery tickets that might bail you out. You sign high-priced veteran backups like Chase Daniels when you have a contending team with a Drew Brees, Pat Mahomes or Aaron Rodgers and you want to make sure you survive a fluke injury. When you have a starter that may not be the guy, you don’t back him up with a guy that you know isn’t the guy but just isn’t a garbage fire.
Seriously, what’s the fucking point of keeping Tyler Bray around for the last 2 seasons? GMs are smart enough to draft for depth at every other position but can never seem to get it in their head that it might be smart to over-invest in the most fucking important position on the team.