To be fair, I'm not sure any QB was gonna be completing close to 68.4% of their passes for the Bears last year.
With AR, my concern is he hasn't shown any kind of growth. Lamar's completion percentage and rating improved markedly from his first season as a starter to his last, when he was at 60%. AR started some games in 2021 then took over full-time last year and his numbers got worse. He's also nowhere near Lamar in terms of rushing ability, or Fields/Hurts for that matter. He had 654 yards on 103 carries, but 231 of those yards came on 4 carries. That means otherwise, he had 99 carries for 423 yards. That doesn't scream special athlete to me.
IMO he is, at very best, a 4th/5th round talent that could eventually become decent but not for several years.