The only reason I thought DS might substitute Ollie was that this was his first game of the season, and maybe not 100% match fit. In the event he seemed to last OK and was our main threat, although possibly slightly rusty with his touches.
The difference between Ollie and Lukaku was that Lukaku was presented with a couple of huge chances with only a rookie defender to beat, which being an oustanding striker he did with the greatest of ease. Ollie in contrast had to create his own chances and had to take on a defence with some of the best defenders in the PL. Thought he did pretty well, and only a couple of great blocks by defenders stopped him scoring.
Danny had an off day, period. He wasn't getting into threatening positions. Admittedly the lack of wingers didn't help him, hence lack of crosses behind the defence.
The problem with 3-5-2 is that we can't easily fit in the likes of Traore, AEG and Bailey, and I don't quite see where emi2 fits in. Wonder what we'll do against Everton.