Many people didn't like Death Stranding because they were expecting it to be more similar to MGS, the games that made its director popular.
So maybe he made the Directot's Cut to more MGS-like, more similar to the previous games of the director. Even if using mostly existing features, who knows if added like a lot of VR missions-like infiltrations, cardboard boxes, sneaking into air vents, etc. So now stealth gameplay becomes more important and that's why they included into the ESRB description.