I would probably give this mercato a 6.5. I think the team is stronger in depth on GK, Midfield and Attack. Weaker in defence though. Alves & Bonucci replaced by De Sciglio & Howedes is a downgrade - there is no question about that.
From a financial point of view this was quite a conservative mercato. The net spend was quite small - less than 30m by my rough calculations. However, in FY18, this mercato would have a net positive impact given the money made on Bonucci - that was a straight 40m gain. It is important to note, howevever, that our wage bill is a lot higher - by my rough calculations and extra EU13m in gross terms given the higher wages to existing players and high wages for Costa, Matuidi, Bernardeschi, & Howedes - partly offset by high wages saved for Alves and Bonucci.
So by my calculations, the P&L is positively impacted by just under EU20m for FY18 - and assuming we did nothing in the next 2 windows, the impact would be -32m for FY19.
Last year's mercato resulted in a strong positive contribution for FY17 given the money made from Pogba but was going to be a negative impact on FY18 (given the higher wages for Dybala and Higuain and the latter's high amortization charges).
Overall, financially, the club's transfer policy is sound and not overly taxing while still managing to improve the overall squad.
--
My key concerns are on how Allegri manages to find a reasonable balance to compensate for the loss of Bonucci and Alves. Also, Mandzukic and Higuain are our chief center forward options. At present they are starters - meaning that all we have on the bench are attacking midfielders rather than strikers. That is why a move for Keita or Schick may have made sense. I guess Dybala himself is the 3rd center forward option.