The vibe I get is he is a good stopper, have the athleticism, aggression, and the determination of the defensive actions (winning the position for the first touch interception, not letting people get pass him) which shows in the stats that was posted by some other members; the thing that I might worry is the same thing that made Juan Jesus bad, like the position and the decision to rush out of position, but the difference is Juan Jesus came straight from Brazil and Cabal has 2 years of Serie A experience under his belt, which should help on the potential concerns.
TLDR: He seems to have the same strength as Juan Jesus and Murillo when they joined us back then, the 2 years of Serie A exp might give him a better foundation to overcome/not have their flaws.