Except Bellerin is barely more proven than Semedo.
Apples and oranges.
We needed a young CB for the future with our already established CB duo in Mascherano-Pique and we needed a young RB since any established RB out there was impossible to get since....news alert......there are very few established RBs out there in the first place. Most of them are either young, had one breakout season or simply average/mediocre.
For the midfield however you need World Class players. Barca need to have their midfield improve right away. It need to be players who can add something and increase the quality of the team right away, not a project who's 2-3 years away from reaching that stage, especially since we already have a project in Carles Alenya.
Does this mean 25+ signings? No, age doesn't matter here, but it need to be someone with those characteristics. Is Torreira that? Not yet, but he might be that soon. I would sign him, BUT only along with a WC MF.
People generally believe that players who perform in the EPL are proven. That was the argument against both Nelsinho and Umtiti and Mbappe as well. Players like Umtiti wouldnt be a "project". I think people are confusing 17 year old kids from some lower league with 23 year olds who have dominated some of the top leagues in Europe. Both are labeled "unproven talents" but they are a world apart.
We simply cant expect us to sign these superstars from rich clubs anymore. We need to focus on young, quality players from significantly poorer teams. The fact that Dembele cost us 150m should be a wake-up call.