I've been hearing some good things about Flacco looking sharp in OTAs and minicamp (while he was there). Obviously you need to take that with a grain of salt, but maybe Caldwell is a good partner for Flacco.

It strikes me that if Flacco looks significantly better this season there could be temptation to replace Cam with Cladwell. At a minimum I'm sure we'd have some fans asking for it.

Of course, if Flacco does well that may reduce the heat on Cam anyway, so it's a bit of a catch-22.

As far as Caldwell's qualifications, I believe he's mostly been a QB coach before being head coach for the Colts. I would think that's enough if you're unhappy with Cam.