I don't have the changelog so I don't know all new additions, but the Skullgirls have way more scenes than last time I played. Here's all the Skullgirl scenes I've seen so far:
-Outside your apartment building, the one who makes you drink her piss
-There's a chance you'll get raped by a Skullgirl if you sleep on the matress behind the apartment building
-A pack of them may appear in the path that leads away from school. They make you eat food off the ground, swallow their spit and kiss their feet
-Another pack that appears when you enter the town and rob you
-A special Skullgirl that guides you around the school and then forces you to buy her water
-A shoekissing scene with the Skullgirls that appear in the hallway outside the cafeteria
-Following this, there's a short scene with a few of them at the sportsfield at night
-After this, a prospective Skullgirl will attempt to capture you. If you let her do it, there's a scene where you're taken to the Skullgirls' hideout where you're interrogated, abused and raped
There might be more, I'm not sure. I know not all of this is new but quite a lot of it is.