Two possibly related questions.
1 Has any body found a away to reduce the 10 second hold / wait to turn off the DSC?
2 While driving a 2015 loaner while my XK was in the shop I noticed that when the DSC was turned off (same 10 sec wait) the center display returned to normal ie a clock, instead of the annoying continuous display of DSC OFF. It also display a greater amount of info in normal mode.

Has any body got into the software and found any ways to adapt / tune it?

 

Not heard of anyone doing it - in fact, I haven't even found someone that can re-flash the relevant modules with the standard R-S software, much less making changes to the standard stuff. My car has the same hardware as the R-S, and I've been told by one of the Jag Dynamics team that it could be done, but no-one seems to have the necessary tools. The standard diagnostic system will only flash a car with software that is valid for its VIN.