I think what I mean about him being yesterday's man, is he would do things like play a back 6, with his 4 defenders narrow and his wingers like fullbacks. When players think that's an effective tactic, they'll go with it. They might hate it. They might not even want to do it the first time. But when it works when they don't expect to win, then they'll do it again and again and they'll buy into other ideas they may not like.
Once other teams work his system out, he keeps playing it regardless and it doesn't work, well they're not going to get that last minute of a cup final type performance out of players for a whole 90 minutes. And from there that sours everything. And then when he throws one or two under the bus, like he will, the rest of the dressing room will think he's the problem and not the player. If they were winning, that type of thing is just seen as part of the magic.
Especially when Pep rhymes with cunt so well.