I am a long time PN user, made the switch over from Context a while ago and cant find any other tool to provide the same features without a ton of crummy UI to fight through. The good news is, however, that I have recently revised my UnrealScript scheme for PN2 and would like to improve it a bit further.
The first issue I ran into was case sensitivity for keyword detection. The second is (and man would it be helpful) to add an UnrealScript.API file.
I am pretty sure that I can improve the scheme further, but I am also wondering if there is a hot key available to reload schemes in the application without having to restart it.