No rookie has proven anything at the NFL level. If you think Burrow and Tua have, then you're not considering the fact they played with top tier supporting talent (OL, WRs, RBs) that the others were lacking. Every draft is a gamble, and teams give up picks all the time, especially for QB.
Thank you too. Good info on Zimmer. Wonder if Zimmer wants him back?
I'd be happy with the more realistic options like Herbert, Love, Gordon, Carr, etc.. Not too picky, I just don't want "limited" or a game manager type. I'd prefer a bit of a gamble for a higher ceiling. I think a Carr/Kelly combo would put us in the best "win now" and intermediate mode. A Rivers/Love combo would be a good middle ground that would give everyone hope now, but also future hope that Love would be a long term guy.
I agree that completion % alone is overrated, but not when coupled with a good AVG.