Over voltage detection feature is to prevent people from blowing up their escs by using them outside of specification.
The kv detection feature was removed to stop people from phoning up asking why their 2200kv neu motor was being reported as a 4400kv motor; the feature is designed for 2 pole motors, the user has to do the math based on how many poles their motor actually has = lots of stuid people didnt understand this and kept phoning up castlecreations to ask for help. No more kv feature = no more phone calls. The kv should be on the motor/ label anyway.
Roll the firmware back to an earlier version if you dont like the current features.