Another problem for CAS at Inverness is within the consultation process; the major objector to ANY CAS in this area would be MOD, followed by BGA, both of whom would have to be included in the 'informal consultation' carried out prior to the actual application. I've done this process several times, yes it does take a lot of man-hours and however meticulous you are, DAP always find something amiss with your methodology eg insufficient environmental consultation.
Provision of LARS in class G airspace is suitable as a short term measure, especially if you can make it a service that's useful to all pilots; that would give some measure of a 'known traffic' environment, but wouldn't of course, mitigate for the low flyers suddenly pulling up from low level, 7001 or not!