Nonsense. There's a lot more factors involved than official formation on paper.
There are few and sometimes no difference between our 4-3-3, 4-3-1-2 and 4-3-2-1, depending on the players we use. It's "4-3-let's see what happens" as Allegri described it. Noce wasn't doing well in "4-3-1-2" either when he wasn't scoring. He got into scoring chances regularly, but that was mainly due to Ibra, Binho and Cassano staying outside of the box setting up the midfielders with chances and forcing them to make up for their lack of box-presence, which is always the case if you start 2+ of them and no pure CF no matter the formation on paper(at times it was a 4-3-3). Noce started scoring and getting into scoring chances regularly again last season right when Binho returned from the injury and was getting consecutive starts, which we then had to give up during the Roma away game when it was undeniable even to stubborn ass Allegri that it had gone too far, the big demand for it wasn't there anymore without Ibra+Cassano and we can't have a midfielder abandoning his midfield tasks(or being useless at it) and doing many more forward runs than necessary while not scoring frequently enough.
Having a box-to-box midfielder who isn't average or below average at midfield tasks, i.e. not Noce, would be a lot more useful, even if Ibra, Cassano, "deep attack" and 4-3-1-2 were to come back. Those aren't hard to find or unaffordable, even for backup. It's not like Noce has a unique or special goal scoring talent. All our runners scored or got into scoring chances regularly when they were playing in a similar role to him(Muntari, Flamini, Boateng, hell even Traore despite no Ibra or Cassano). It's just that everything wasn't set up for them as perfectly and/or for as long time as it did for Noce in the 11-12 season. Noce's shortcomings still hurt us badly even when he was scoring, because besides it he wasn't doing much else other than running back and forth, losing and not recovering balls. Now why on Earth would you make up excuses to get this back?