I had liked the prospect of Mike McCoy, but really wanted to keep Lynn for continuity. Our offense was 6th in offensive TDs heading into week 17. That was based on our running game and TT. Just having Shady doesn't equal a running game. The OL did very well in run blocking these past two years under the zone running scheme. TT accounted for almost 25% of the run game. There are plenty of articles defending his field vision. Does he have flaws (like leaving a clean pocket)? Yeah, everyone does. He's still in the top 1/3 of NFL QBs, and is better than most under pressure. If we get rid of TT or dump our running game scheme, we are most likely going to regress, and that's not going to get us into the playoffs any sooner.
If Kromer or some Roman disciple was to take over, then I hope that we keep TT and the zone running scheme in place. If we get some pass happy coach, I doubt the offense will succeed (we don't have the receivers behind Sammy to pull it off). As we've proven year after year, we need BOTH offense and defense to succeed in order to get out of purgatory.