Certainly true, and I would give the lop-sided 4-2-2-2 a chance once Alex comes back. With Sissoko back in midfield we can afford to allow DP more freedom on the left up top, which is where he likes to hover anyway.
That's not exactly how we played that season though. DP wasn't used as an attacking midfielder, but rather his usual support forward role left of Trezeguet.
When Alex has been used as a attacking midfielder instead of just being given a free role up top, he hasn't excelled.