I just finished up the new abandoned waterway facility today. Gotta say, it was a lot of fun, but I wish I had got the pirate naval combat feat first (I'm going to get it eventually) and I wish I had known how FREAKING GIGANTIC the dungeon is; I brought plenty of stuff with me and still ran out about halfway through. It's good to have a jetski dungeon; that was real nice. New dangers, new enemies, new items, new oddities, ability checks, all good. The loot is too good, imo, but I think the enemies are all pretty high level and good lord there's tons of them, so whatever. Kinda confused by the lowdown subterranean stuff, if you get what I'm saying. Overall, very good stuff.
I always wanted to go inside that building next to our house, and it was a fun experience as well. Not difficult, but still a nice unique little quest. Kinda neat breaking into (even with permission) a semi-abandoned law office; felt odd given the setting but I liked it. Haven't figured out that door in the basement yet, if it's anything, but I have an idea still left to try.
Haven't seen the other stuff yet, except for a handful of abandoned jetskis to loot.