I think the key point many of us are making is that it's a promise he should have never made, and I noticed it's one you also made on the citywatch podcast.
I see the credence to the trust of the squad argument, and I fully recognise its importance, but Manuel backed himself into that corner, it's a promise he never had to make. And it led to him playing Russian roulette yesterday.
There were some serious potential drawbacks to either choice, he started a player in poor form due to a previous promise going against all conventional wisdom costing us the cup final and losing the support with it (potentially derailing the whole season), or he dropped the out of form player for a superior alternative and we lost anyway, and we'd be plotless and Pellegrini would have lost the trust and respect of the squad (potentially derailing the whole season).
Thankfully it went perfectly, fairytale stuff. But make no mistake, Pellegrini made a huge error making that promise in the first place, and it led to him taking a huge gamble.
Personally, hearing his comments when I got back really jarred with me. We knew that was his thinking going into the game, and that's what angered so many of us. If things hadn't gone so well and we'd lost I'm sure he wouldn't have been so forthcoming in his post match interview.
But, I'm of course delighted it went the way it did. Especially for Willy to be the hero the way he did, could see how much it meant to him and the rest of the squad, could inspire us on now in the league, fingers crossed.
All about those margins in football, a hair' breadth from catastrophe and euphoria.