This game has come a long way since I played it last. The overhauled story makes a lot more sense and eliminates some of the particularly bad "porn logic" (*cough* blowjobs as training *cough*). The porn logic that remains is much easier to swallow now. Level four is good, though it has too much of a focus on anal and ass-related activities for my liking.
The improvements to the early levels are good as well, the balance feels pretty good now. I died a bunch but it rarely felt like it was the game's fault rather than mine. There were still a few "enemy stands too close and now I can't hit them despite having a fully loaded gun" moments though, which was... vexing.
My only other complaint is that for a game that has several sections where you're forced to be a single hit from death, it's very tedious to reload a save game. You have to wait for the CG to pop up, then exit it to the main menu, then navigate down to continue. It's the sort of thing that I wouldn't notice normally, but when I have to reset five or six times because I keep fucking up a specific section, all those wasted seconds start to feel grating.