I was thinking this at first but ultimately it only applies to Evero who likely couldn't care less what we do at QB. Between McCown being regarded as a great QB coach for young QBs before even having the coaching position and Brown being deemed, in McVay's own words, "one of the best teachers he's worked with", the Panthers might be in an amazing position to draft a QB in the first.
If Reich, Brown and McCown believe that any of the top 4 guys are coachable, I wouldn't be surprised if they choose to sit at 9 and wait to see who's left. Because of this, I'm actually kinda high on Levis and Richardson because when put in the hands of these coaches, they both have a great chance to reach their ceilings.