I have said many times that there are definitely good coaches out there and it is Jones' job to find them. Perhaps McCoy is one, though I certainly did not predict it.
However, I have zero faith in Jones taking coordinators and turning them into good head coaches given his proven track record of failure in that regard. There are ones worth pursuing -- but they generally come with a label of "can't miss" attached to them, like Rex Ryan did. In fact, I would say the same applies to potential head coaches from any venue, for us, ie, Jim Harbaugh was another "can't miss" head coaching prospect, though he came from college not from an NFL coordinator spot.
Those are the guys who will have the pedigree (and the pull) to prevent themselves from being complete flops here. I would also point out that just because McCoy succeeded in San Diego doesn't mean he'd succeed with the circus in Dallas. McCoy was not that type of HC prospect and there just aren't any of those types available this year, unlike last year when an Andy Reid was available (frankly, Garrett was once actually a hot name, though not a can't miss one.... our failure in that regard developing Garrett here when Baltimore, a team who continues to churn out quality staff again and again, wanted him.... kinda indicates that the environment is at least partially at fault).
I'm not willing to pull the trigger on a complete unknown here. I either want someone who comes with a quality guarantee or I want an established guy who I know can get us over the hump. I don't believe that the difference between Garrett's mediocrity and some other coach's slightly better mediocrity (or slightly worse, though everyone's anger right now doesn't allow them to acknowledge that possibility) is enough to justify the coaching change as I do actually think having the stability in place is good for the team.
And last but very much not least, I especially do not want to lock myself into the next Chan Gailey, when convention and Jerry Jones' personality will mandate that he MUST BE GIVEN TWO OR THREE SEASONS, and then miss out when Rex Ryan gets fired next year or Sean Payton decides that he wants to move home to Dallas or the next big name from the college scene indicates his willingness to come to the pros, because hey.... we have to give our Jay Gruden clone a chance to succeed.
Nope. Sorry. For all of those reasons, it's not a good idea to fire Garrett right now. And the fact that Jay Gruden, Mike Munchak, and Mike Zimmer are the names on everyone's short list right now should make you guys stop and think.
All the options right now are likely not good enough to turn a Jerry Jones owned team into a Super Bowl contender. When I find someone who is likely good enough to do that, then I'll make the move. Obvious names like that come along every season or two, it's not rare.
I will be more than willing to fire Garrett when I hear a name I like. The difference between our positions is frankly not as wide as it seems and most of the arguing is due to obvious hyperbole on the part of the anti-Garrett crowd and my inability to let it go uncontested.