As an interesting sidenote, I purchased an LE trade-in Glock 19 in few years back that came with the NY1 trigger spring installed. In actuality, it wasn't a terrible trigger. It broke at about 8-9 lbs., but otherwise felt just like any other broken-in Glock trigger.
Of course, I replaced it with a regular 5.5 lb. trigger spring, but the change was not drastic at all.
I don't have any experience with the NY2 trigger, but at 12 lbs. in such a lightweight gun, I could see where it could be borderline dangerous if it kept you from being able to put shots on target.