Indeed, but its excellent they are letting us pay the other half of the payment next summer, not that installment in fees are anything new, but its more to work with this mercato, which is more important then what next one should be.
You are getting two very good players (their best duo after Di Natale) from a team in CL qfs, who arent in a position to be forced to sell, and both players are valued at 15m, yeah its fairly expected fees.