I'm a bit surprised he turned down Cleveland. I like their ownership and that's a pretty fantastic roster.
But, hey, got to give the guy props. He's obviously not solely interested in dollars.
McDaniel's downfall as an OC with StL last year was that his offense is pretty complex, with practically every WR having a few route options on every play. IMO, it's a brutal offense to install with an inexperienced QB. Too many options for too many players to run when your QB is still trying to learn to read the defense. I think he'd fail in Cleveland, at least initially.
Now, San Diego would've been a good landing spot in my opinion. The holdovers are already used to an abrasive ass, having dealt with AJ Smith, and the offense has a lot of veteran skill players who could do McDaniel's calculus.