Well, what irked me was the fact that the con messages didn't change. I grew used to checking the message instead of the outline on their name for the con. Even if they don't see me (no red outline around name) they are still scowling furiously at me.
Also I was taken a bit aback by the fact that the guards in the cities can still see you even though they are not agro outlined. Nothing beats going into Freeport to grab some quests, seeing the guards' names go 'normal' and sliding in, only to hear them yelling at you, chasing you by running back and forth until they finally catch you and toss you out on your ear.
The first part just requires me to adjust my play habits, I can live with that. The second part amkes no sense to me though.