OK but, think about this. Dybala was tried on the right wing and played deep. We can all agree it was not his best position. Perhaps Lukaku is better as a CF than Dybala. If Dybala has another average season with us, his value would plummet.
So lets say do this. Basically first choice center forwards would be Lukaku and Ronaldo (as he can play well in both positions). Ronaldo-Lukaku-Chiesa? Would that be better than Ronaldo-Dybala-Bernardeschi/Costa? Economically, selling Dybala would be highly lucrative even though we are shelling out for Lukaku given the plusvalenca.
I am still against this deal, but the more I think about it - I am seeing the logic more and more.