Once he goes to Ubaldo he's in for awhile. Only Zach, Hunter, and Bundy were left to pitch. So, if he panics and removes U after 2 batters he now has only 2 pitchers left. Which probably gets you another 6 or 7 innings assuming no one gets hurt on the mound but still managers think about that stuff. He wasn't going to pull a guy who could in theory go 5-7 innings after two batters. Even in a do or die game.1). If Harbaugh made some equally bad decision, you would be crushing him...and Harbaugh has actually had postseason success.
2). Staying with Harbaugh...you complain that he doesn't have a good feel for the game at times. It was obvious Ubaldo had nothing to those first few batters. If you want to hold off with Zach and hope to steal an inning or 2, fine. However, when the first 2 get on and the stuff looks that bad, you had the option of walking EE and then getting Zach in at that point.
3). How Ubaldo finished that game means nothing to how he could have started it.
4). Buck may not have been excited about anyone ending that game (Bundy may have been fine though) but you have to get to that point first. Zach should have been able to go multiple innings last night. So, you could have used him there, gotten the lead in the 12th and then closed it out with him in the bottom of the 12th.
Because you are the road team, you don't get that last at bat. So, you have to do what you can to continue the game.
Buck screwed up here. As you said earlier in the thread, you want Britton in the highest leverage situation possible. They didn't go to him earlier and since he was still there, that was the highest leverage situation possible and Buck had a guy off the street and a starter who struggled most of the year deciding the fate of this team. That can't happen. It was an awful decision on every level and no matter how much you want to kiss his ass, that doesn't change the stupidity of the decision.
I don't think he should be fired over it though. He put trust in a guy what had been very good for 6 weeks...but this was a different role and he looked terrible from the get go. Buck should have recognized that immediately.
Also, Harbaugh is mediocre while working in a top tier organization. Buck has been good in a bottom tier organization. Buck should walk away and show everyone who thinks a manager makes little difference how wrong they are.