Having just read the airprox, it appears this incident could have been stopped on a number of levels without a CWS. There were a number of assumptions made from Typhoon A, Typhoon B and ATC. Deficient planning [lack of backup deconfliction plan for Typhoon B] Any number of those areas, if challenged, would have nipped it in the bud.
Further to that there should be question on the suitability of Typhoon A's aircraft without L-16, a radio defect, and a display issue.
I'd challenge the RAF to sort these areas first.
I admire the fight to get a CWS, however I myself don't see it as a panacea. To me, it doesn't necessarily matter how the SA is gained; for example robust planning and authorisation, as well as working L-16 in both aircraft would have prevented this case, as well as Moray Firth. (yes, I know this wouldn't help with civ aircraft).