Not really seen Mata since he was at chelsea bar the random game tbh.....but i would say koulibaly and carvalho would add more to our current team.
We need a superstar CB and a top class DM more than someone who would push Barkley back to CM.
Also if its £70 odd mil for those two then Witsel would sit up and take notice.
We won't be spending anything on a 'superstar' CB until our current superstar CB leaves Zat.
And yeh I agree that Carvalho would be ideal for Koeman's 4-3-3/4-1-4-1 (which is how he set us up against Barnsley) - and Barks absolutely thrived in the role on the left of that 3.
However, that's because he had the space and time on the ball and he doesn't get that in the PL. As good as he is we know that sides do double up on him and the best way to solve that IMO is getting a playmaker in of the quality of Mata or even Sigurdsson that creates more room.
In my view a player like that is worth the £25/30mil as it'll also help us get the best out of Barks.
While I'm at it, also expect Kev to have a good season this year if he can stay fit through pre-season and the early part of the campaign, while Del will certainly be fitter (the pre-match warm-ups alone were intense so training must be double-so, especially atm). Lennon I reckon will also feature quite a bit.