Get rid of Vermaelen and sign de Ligt. We have both experienced players and young prospects at CB.
De Light wouldn't play too much in a short term future (2-3 years) since we have Pique, Umtiti and Lenglet.
Unless, as fans wish: we would drop Pique, and/or bench Lenglet so that De Light can get more chances and develop.
You know that idea: drop someone who is a safe bet but with a lower potential for someone who is young and has lots of potential on paper, but hasn't even came here yet.
But since Pique is a club icon, he won't be benched, and he is still a good player.
And a guy whom we already have, Lenglet, is playing quite good.
Quite better than fan's favorites Dembele, Malcom, Semedo.
So, to some extent: if those guys deserve chances even though they play hot and cold or bad, why would we bench Lenglet who is better than them in his 1st season?
Pique is 31, Umtiti 24, Lenglet 23.
If both 3 will play good, I don't see too much room for a new guy in the next 2 years, unless is we sell one of them.