Cencelo: Trent gets unbelievable hype though as a LFC fan I believe he is a weak link. Juve is so strong, they are guaranteed to win double every year. The standard in unbelievably high and not sure if he reaches those in SM's review system.
Gimenez and Lenglet: Gimenez's is the weakest of the lot. I think in real life he reached his limit. He is more likely to unsettle the opposing strikers through "dirty" talks and rough tackles than actual defending. Also he will grow concern.
Lenglet: I would keep as 5th defender or loan him. But if you want to sell 2, he would be my second. A lot depends on Barca's summer transfers. If they sell Umtiti and buy De Ligt then his role will get limited again. If they keep Umtiti and also buy De Ligt, he literally becomes the 4th defender.