I wouldn't say it's a mess, having played through the entire thing myself. The missing events around Ain are the most serious bug I noticed. There are a surprising amount of typos - I counted a few dozen at least - in both old and new content. There were some more minor bugs that person listed and some others that are probably being tracked already because of how obvious they are, like the save menu not loading the correct images until you mouse over them.
The reworked events have introduced some discontinuities later that are probably being tracked. For example, once you take over the highway settlement and fuck Kyra, she'll mention that she hasn't let Asha fuck Zaton before. However, in the expanded events in Adira where you help Kyra regain control of her gang, there's at least one path where Zaton does fuck Asha next to Kyra, so Kyra's later concern for her sister no longer makes sense. Not sure if that's a flag bug or if the post-highway victory event hasn't been updated to account for the new sequence of events.
There's another event in the new content that isn't as bad but was pretty noticeable for me - Ivy goes through a combat sequence where she gets several severe bruises, but in her next appearance a few in-game hours later, she's completely healed up and none the worse for wear. I'm not sure if that's intended - maybe elves have a heretofore unmentioned healing factor - but it made me wonder why the dev would bother scratching her up if it didn't matter, especially considering that the other mutants mostly end up covered in blood but uninjured otherwise. Ivy gets the shit kicked out of her and seemingly shrugs it off.
