Not really bothered. This sort of transfer is completely irrelevant to our pursuit of a starting striker, if that's what you mean. We sign young talents and send them elsewhere to play so they increase in value, we then use them as makeweights or to generate cash. Occasionally the best ones might come back here.
The issue shouldn't be so much with these type of deals, but rather the individuals. Zaza for €5m seems fair for his total price -1 year left. We might co-own him for €3.5m straight after that. Or he might go on loan elsewhere and score 13 goals and suddenly be worth €8m.
Moggi used to do these sort of deals all the time. It just wasn't an issue back then as we were a different club, different league, and we overshadowed them with big signings.