I'm replaying parts of NnT and I can confirm me saying it's pretty buggy at times. I still find new bugs/glitches/fuckups, and hardly doing anything too unorthodox.
One good example is the section near the end of a game where you're posessing a slig and have to shoot a huge wave of slogs coming from both sides. In NnT you can just cheese the section by pulling the lever that starts it, run to the right of the spawn point, turn back and shot slogs spawning from both cages.
It's hard to defend something so hastily/lazily coded, in my opinion.
Also, the mines are still broken. One blew when abe touched a green blinking mine. Again. So it's not just my reflexes, I looked at it carefully.
Saws still can sometimes kill you when they're at their uppermost position and you're trying to hop beneath them (like
that) which never happened in precise as heck Abe's Oddysee.