There have been too many special interests at work in this unfortunate incident with the lawyers hovering like vultures in the back ground. Static and dynamic sidslips are differebt breeds of the same animal; one can be quantified and measures taken to limit it, the other one cannot be quantified and, thus, cannot be protected against. Having said that I recon it is not beyond some clever software engineer to devise a means of doing so on a fully FBW aircraft.
With a couple or three accelerometers and a teensy bit of power, a sensor unit the size of a cigarette package in the tail area could provide all the measuring needed, and a similar-size box up forward with access to an airspeed data signal would be able to provide numeric data for the logs and an actuation signal for panel or efis display advising caution or emergency status re dynamic sideslip. Log data from same would be useful for assessing cumulative airframe & tail stress history. Cheap (in aviation terms), easy enough to make and retrofit. No FBW and no rocket science required. How many would you like?