I gave it a 9. I'm happy that we added a solid depth to the squad and I'm happy that we already have a solid back-up striker like Alcacer. This kind of depth could win you the league in more critical times.
I gave it a 9, because I think we could have got a better replacement for Bravo, especially when Diego Alves was an option. Digne, Umtiti, Denis and Paco are all great signings, not just because their abilities, but also because of age. This was a great summer in this regard - refreshing the squad with younger players. Great job. I'm not mentioning Andre Gomes, because I expect some problems with him in regards to playing time. It's absolutely impossible for him to break Iniesta and Rakitic's dominance in midfield and he still have to fight with Denis and Rafinha for every other minute left. And I think Lucho really likes Denis. For Rafinha we all know it already. Call me pessimistic, but I think Gomes could leave the team next summer. He doesn't hold the reputation of a back-up player, he would easily have a lot of other options to be a starter somewhere else.
But, yeah - for me the cherry on the top this summer was Alcacer. I'm a big fan of the idea to have a profilic striker as back-up, because this could save your ass big time when everyone else is having a bad day. Digne, Umtiti, Denis and Gomes added depth and they are all young. A great summer for me.