If we get Upamecano in too, that'll be fantastic news. Add in a RW, and we genuinely do not have a glaring weakness anywhere, unlike the previous few seasons. And we will have game changing options from the bench (in Greenwood, van de Beek, maybe James for counters and Fred for pressing, while Lingard can cover a lot of areas (but not do too much, but what have you).
We can improve the quality of the players across the pitch, and we need to further improve the players we already have but it'll be a fantastic start. Add to that, the youth in Mengi, Tuanzebe, Garner, Galbraith and Laird and that's a pretty good mix to go into the new season.
But I dunno, not sure of these Upamecano rumours. By all accounts, he was Bayern bound next season, despite their embarrassment of riches as both Boateng and Alaba maybe gone.