I have not gotten the Nov security update yet so I can't comment on that. Here is my experience so far:
- initially I would sometimes get crazy, continual ghost touches. Turned down the sensitivity and got the first update and that went away.
- subsequently everything was great for a couple weeks. I could do the touch test from the xda-developers forum and see the "issue" with the N-shaped traces, but it did not affect me in real life usage.
- Recently, I occasionally get dead zones. Tends to be near the bottom of the screen (for example, I can type some letters but not others). Usually if I just lock the screen and unlock it it starts working normally again (sometimes have to repeat this one or more times).
- less frequently I have had interrupted swipes. For example when swipe typing, my swipes would register as multiple short swipes instead of longer ones. Again, locking and unlocking eventually makes it stop.