It would be a a very welcome feature to be able to alter some fixture properties from the library defaults.
Mainly orientation and home positions but other things like gobo rotation speed, etc. (have had some fixtures where gobo rotation is slow to fast in vis but fast to slow in real life)
The orientation one would be a huge bonus. Currently if I have a job rigged from a Capture plot and some of the real fixtures home/move differently to the plot then while I can alter the plot it would be better to correct the library profile.
Maybe there could be a place for user tweaked profiles to be submitted for evaluation and sharing?