Apologies to all, this is going to be a long post. I'm trying to address a long list of issues here so there's no way around it.
Doug..... the is NOT the first time you've posted this. And I've never seen a single other poster embrace this viewpoint. As far as I can tell, you're alone on this. And I think for good reason. There is zero proof that Grigson was fired over Allen/Doyle. If that was the case, he'd have been fired the Monday after the season ended, if not sooner. But he was fired 3 weeks later. That completely undercuts your position.
GM's don't get fired over Doyle ending up the starter instead of Allen. Especially since Doyle is a plus in the Grigson column. Honestly, the issue of Allen/Doyle I would doubt would make the top-20 reasons, but I'll give you at least 10 reasons, if not more, why Grigson was fired and none of them have anything to do with Allen/Doyle.
GM's get fired over Big Picture issues....
1. Back to back 8-8 seasons. You are what you record says you are and Irsay found 8-8 (x2) to be unacceptable.
2. An inability for Grigson to get along with his HC, his coaching staff and his players. The revelation that Irsay had to bring in a marriage counselor to try and get the two men to work better together is, honestly, humiliating for the franchise. Who does that? Plus, Irsay chose the HC over the GM, that's not typically how it works.
3. 4 and a half years to get the OL anything close to being right. It wasn't until week 9 or 10 last year that the line finally started to look like a line.
4. 4 1/2 years of Luck either leading the league, or being in the top-3 in getting sacked, or getting hit, or getting pressured. Grigson famously had a note on his desk since Day 1. "Job one is to protect 12." And he didn't do it. Not for a lack of effort, but he failed never the less.
5. Allowing the defense to get so old and so slow and so unskilled. The Colts were 30th last year, and I think I've read in the 5-years of Grigson/Pagano, the Colts were 20th or worse, 4 times.
6. 2 and a half years of Pep Hamilton. He was never as bad as his critics claimed, but he wasn't good enough and it took entirely too long to make a change.
7. Way, way too many misses in the draft. Too many to list here, we all know the names.
8. Way, way too many misses in Free Agency, Too many names to list here, we all know the names.
9. 4 straight years of getting WR3 wrong. Avery, DHB, Nicks, Johnson.
10. 5 straight years of getting CB2 wrong. Vonte Davis is good, but the rest..... well....
11. 3 straight years of getting RB1 wrong.
12. 5 straight years of not much pass rush beyond Robert Mathis.
Are you beginning to see the difference in the issues I listed as opposed to the one issue you listed? They don't compare. Personnel decisions are subjective. Rarely is an NFL GM fired over one decision unless it's at the most important --- QB. But you're going to make mistakes, it happens to every decision maker, even Bill Belichick. But you make too many mistakes, THEN you lose your job. But one decision on a mid-priced player is never the reason a GM loses his job. It just doesn't work that way.
Sorry this went so long..... there was much to say....