Well for me we can never have to many good players MK and he's clearly got talent. To be honest I think considering that we've just brought in Deulofeu and signed Mirallas on for a few more years we'll see a change to 4-3-3 mate. If we're paying out £15m on another attacking goal scoring winger while we're seemingly being more desperate for a creative player central link player I can't see it being anything else to be honest.
I actually think it suites us better though as it stands, I think it helps us play to Lukakus strengths more. Clearly the trick is getting teams to come at us at home so we can hit them quick and effective. It might be alright away from home but I'm not sure how it changes anything against the likes of West Brom, Palace and the likes at Goodison.
(Might have to whisper if quietly but I think Barry's the key to us changing formation to 4-3-3, he's the only one in the middle who see's a forward pass and is still disciplined enough to conduct the midfield)