I think that if they had removed the offset limit altogether, it would have been more dangerous.
I like to believe it is more a give and take, that Tesla has to modify (and will do so) their AP software's behavior as needed, and we can almost all agree going too fast in an suburban (residential) neighborhood or divided lanes needed to be mitigated to eliminate the suspicion that the vehicle was operating even semi-autonomously at what would definitively be defined as an unsafe speed. While most follow the speed limits, we can all agree there are times that the flow of traffic does exceed the posted speed limits, even the local and state law enforcement agencies know that.
This is a compromise on the part of Tesla, attempting to keep both judicial municipalities and customers happy. I am glad they looked at what they had done and came to the best conclusion.