This incident as well as the handball in Dortmund match just prove that, even with VAR, there still will be 50:50 decisions as long as there will be only 2 dimensional videos available.
Different viewing angles lead to different decisions.
What definitely still can improve is the consistency of the calls or the officials. Especially when it comes to handballs and penalties.
If it's 50:50 it should just ALWAYS be no handball and no penalty.
Still VAR is an huge improvement. At least blatant wrong decisions will be called correctly. Madrid would have a couple of CL titles less if VAR was in place a few years earlier.