Look, my opinion on Pellegrini is very close to yours, but I reckon that yesterday he decided to take a gamble on losing a game in order to maximise our chances of winning a much more important game. United drawing means the loss hasn't hurt us too much and I've watched other managers like Ferguson do exactly the same thing over the years and get hailed as geniuses. As fans, we tend to focus on the little picture, a shit performance and poor result, whereas the professionals at the club are focused on the big picture. If we get past Madrid and you're buying your ticket for the Champs League final, say it again the Champs League final, will you still be thinking back to Southampton away and fuming about the team selection? I think not. Most of those railing against the manager will be celebrating beating Madrid and hardly any will be re-visiting this thread and accepting that resting players had contributed to the result.
Maybe but nothing short of winning the cup compensates for finishing 5th.