Nothing wrong with your tactics. Very up to date and modern, quite Germanesque dare I say. Just don't think they're very Allegriesque and that's the reason why I have a hard time imagining us play that way.
I think at the start of the season if rumoured transfers go through it'll be:
Vlahovic - Di Maria
Cuads/Kostic - Locatelli - Paredes - Zakaria
Sandro - Bremer - Bonucci - Danilo
Perin