Funny. That's not how it worked for the Chiefs, or the Dolphins, or the bills, when they used guys like Alex Smith and Ryan Fitzpatrick to cover their QB position while they strengthened the rest of the roster. By the time Allen and Tua came in, they already had the assets to build around and the result was those 2 teams are now at least fighting for playoff positions.
It seems to me that that's EXACTLY how you build a roster. Compares rather favorably to your idea of copying the Panthers, Jets and Commanders.