Who's to say that that would be the way that Chelsea would play next season under Di Matteo?
Presumably, if he gets the job then he'll be allowed to instigate changes to the squad.
What he's achieved so far, he's done with someone else's team. A team that's in desperate need of an overhaul. Players like Terry, Lampard and Drogba are all past their best and will need to be replaced in the next year or two. Plus they have players who aren't good anyway - Kalou, Obi Mikel.....
Even with these limitations, Di Matteo has conceived a strategy that utilizes what strengths they do have, and turned them into a completely different team than the one that Villas Boas was managing earlier in the season.
If this is what he can achieve with someone else's limited team, then he should be given the chance to prove what he can do with his own.
It wouldn't surprise me if he gets a 12 month contract - in 12 months time Guus Hiddink is out of contract, Guardiola will be closer to returning to the game, and Mourinho may be tempted to end his reign in Spain.