I just got off the Nautilus. I felt a bit rushed at the end of that area. The experience reminds me of Neverwinter Nights II to a degree, where at character creation and when starting out you are given an overwhelming set of options, but you really have no idea how important any of them will be. In NWN II, by the end of the game you realize only two or three things were really important. I am starting to second-guess my char creation choices already. Was phallus option "D" the right pick? We'll have to wait and see ...
Sorry if you picked Phallus D, you’re railroaded into the worst ending possible. Only way to defeat the Absolute is to go full Ouroboros and chew your dick off. It’s an Acrobatics check so you might want to respec.