There are 2 distinct camps developing:
1. Those who wish to keep the 15 hr UK IMCR, albeit called something else, and work to get it accepted by the rest of the EU.
2. Those who wish to kill off the UK IMCR and make the 50 hr IR somehow 'easier' to attain.
Well, sorry but I cannot fall in with the second camp. Who seem to be the well-off types of the PPL/IR world, in the main. The only real way forward with Europeans is to use their own rules back at them. Such as 'proportionality' of requirements....
IMCR/Class2IR and IR should have the same core IF skill requirements. Nothing to do with navaids or airways, I mean the basic stick and rudder skills to fly in IMC following ATC`instruction as required.
However, the rest of the training must be 'proportionate' to the needs of the end-user. So, for example, an FI, who just wants the IMCR privileges to climb up to VMC on top in order to teach basic lessons, does NOT need the same en-route training as the dedicated long distance IFR cruiser.
As for holders of other ICAO IRs? They should be accepted for direct conversion to EASA IRs with no formal requirements beyond issue fee and ICAO level 4 English.