I'd argue Vicario, Porro, Udogie, Van De Ven, Maddison are all players that are of better quality than the ones they replaced.
Not disagreeing with the ones further back but I feel like we've turned a bit of a corner in actually replacing players with quality. That said how do you replace Bale, Kane and Modric, turned them into the best players in their respective positions in the world.
Impossible job that and a bit of a nonsense argument.
I don't think any club is able to replace world class players unless you're top top bracket clubs.