I don't like the way we currently play because we don't score enough goals and were it not for a bit of luck with that Jelavic goal we'd be looking at one win from our last 11 games.
If Fellaini moving back means we score more then i'm all for it, and i feel we might as well try it. What's the worst that can happen, we lose instead of drawing again and drop a point.
At this point winning games is way more important than playing lovely stuff, our points target is way off what it should be to feel optimistic about the chance of CL (or even Europa League) footy. While you can look at the league table and get some reassurance from the fact that we're fourth and teams below us haven't been getting as many points as you'd expect either, you can be sure it won't stay that way.
We need to kick on and start winning games on the trot, if that means sticking two up front and moving Fellaini back to shore up the midfield than lets do it, or at least try it and see what happens.