Ole said after the Southampton game that it was a learning opportunity. I think it really was, for him, not just the players.
He spent the build up to the match talking about Southampton's game - in detail - and he knew 100% how they'd play. Of course, the temptation to field our newly emerging XI is there, and probably rightly so. Can you play that style against a high press and relentless intensity? Turns out, probably not, at least that first team needs some improvement to the first XI to cope with that style. But Ole has been a master of the dark arts of soaking up pressure and hitting teams on the counter, throughout this season. In hindsight that would have been the way to go against Southampton - give them possession they don't want and smash them on the counter. He didn't start off with that, but he could have shown in-game management and tailored our play to that.
Throwing on James with no one to feed him was pointless. We either needed a hold up player up front, or two pace merchants dragging them out wide and Bruno/Pogba behind them.
I say this because I sometimes worry that he is tactically naive. He's figured out - more or less - how to play against more dominant teams. He's now started to figure out how to open up deep sitting teams. He struggles against teams who like to counter and press (like Wolves and Southampton) and he probably thought he'd found a style to suit all occasions. Which, in hindsight, is strange given that he elaborated in such length about how Southampton would set up. He knew what was coming but failed to notice we'd struggle with it. Hope he learns the lesson to anticipate better and change course sharply when things aren't working.