There will never be an IR "Lite" as long as controlled airspace is the home of CAT. The airlines would ensure that any attempt to allow lesser qualified individuals to inhabit the rarefied air is quashed.
I have never understood this. If an IR(light) were anything like an IMCR, an IMCR already enables pilots to operate in class D in IMC to the same landing minima as an IR holder. They are as we know excluded from class A.
Were they to be permitted to operate in class A, their operations would all be in the lower airways, which in Europe is rather like marching through a desert, you will not see another sole for hundreds of miles.
So in reality the only points of conflict between CAT and GA would be in the TCA were the traffic is joining class D. For those with just an IMCR the traffic is already there and with a great proven safety record.
If CAT were really that bothered the IR(light) rather than being restricted to airspace class, would be restricted to altitude.
Whether Euro control wants GA causing more delays within the system may be another element.
The fact of the matter is the existing system is seriously flawed. It also seriously degrades the safety of the system for all users. If you are involved with the regulatory policy making, you know it, shame on you for not doing something about it.