I've always said Deles best position is quite niche. It's as you say, around a big man playing off the cuff and on instinct. Yes he's played CM, often to his credit, when we've needed helping out in those areas. But he has never shown enough, and that is probably because he lacks the all round game, to be a first XI pick in that area.
So it does leave him (and Jose) in a bit of a predicament. He really does appear way off the first team squad let alone the first XI, and if what I'm saying is correct, his best position might not even exist in a 433 only a 4231, and imo Jose would prefer a 433 ala the robben duff drogba days.