I mean in overall past 4-5 years, we been gradually improving and adding real quality to team ambitiously for every season EXCEPT for Vidal and Pogba cases I already said. Tevez = Dybala for me, and that says alot of how insane Dybala is. Thats as good as a replacement gets. Pirlo was great but he was naturally declining big time and had to make way, replacing him positionally with Marchisio has been fine even if fairly conservative. The rest are all improvements for me, Higauin > Morata despite me being a much more of a fan of the latter, its dead obvious, and Alves > Cuadrado. And in general Marotta just knows how to carefully add needed quality to the team (except AM lol), we have on our bench now players who would $#@! on our starters from some years ago.
Only things I dont like is as said selling Vidal and Pogba, especially former, and not directly replacing them well enough to diminish our greatest strength for CL which was the midfield. Also I kinda dont like how our long term top level generation of players is kinda halfed with Pogba and Morata leaving same summer...Only have Rugani and Dybala now (way too soon to talk about Pjaca until he shows something), and Sandro if you wanna ad 26 year old to the pool of youngsters. I'm not youth obbsessed player, but its kinda unfortunate most of our recent bigger signings besides Pjanic are 29 year olds or so, for long term goals, or for glass half empty fellas here, for maxium re-sale value later.