She's had another 20 years on top of that, so I'm thinking she's going to be pretty much completely human at this point. She definitely seemed a lot more human in first trailer when we see her talking to Picard. I really don't see them killing off Hugh, from the way they've been promoting Jonathan Del Arco, it seems like he's going to be a fairly significant part of the show. I guess it could be a fakeout, and the kill him off right away, but that seems unlikely. According to Wikipedia Jonathan Del Arco is 53 and Jeri Ryan is 51, so there's a pretty good chance Hugh is older than Seven.