I think he did that with PSG.
To some degree the formation and personnel don't matter, it's the philosophy and system that do. Sort of how you can lose Dougie or McGinn but still have everything be coherent it just plays a little differently when Tielemens takes over from one of them.
Maybe we can make up for the aerial deficiencies with a taller RB and CM than Cash and Kamara. Maybe some of our other defensive issues can be fixed by a change in our mentality or by defending differently further upfield.
I suppose either way I am not worried about it we'll be even stronger next year I have no doubt but with the players we have assuming no signings and everyone is fit.
Konsa, Mings, Pau, Digne screened by Kamara, and Dougie is the strongest back 6 we can play IMO. That team will be physically impossible to put on the field come September 1st so it'll be interesting to see what he decides we need.