Changing the formation for Inter doesn't sound like a good idea.
I'd start Kostic and Openda for missing Cambiaso and Chico and stick to the main formation. Mario didn't look too good on the left last time either.
We want to have players that thrive in 1vs1 situations. Yildiz, Openda, Chico and Zeghrova are all capable of beating their marker creating an advantage.
Capital gain or loss on a single player is not that important. What's important is your final financial result. Minusvalenza on a sale of a player is no different than any other cost that hits the profit and loss statement. Be it another player's wage or security services on the stadium.
However, it's gonna be the last time we have Vlahovic on the balance sheet while those 23m for Kolo will be there for the next five years. Anyway, it's not like we have a choice. It seems we would surely offload Vlahovic if there was an offer.