The reason my module 1 was fairly limited is that I perceive there are a large group of UK IMCr pilots who don't actually want or need a 'real' IR but would like something to make modest IMC legal and safe (situations where there is a thin layer at 1000-2500 and being on top would be a lot safer and easier than slogging underneath. I tried to spec the restrictions so that they would make reasonable sense in any of the European airspace systems (in that they are similar to the practical restrictions on the current IMCr). This group seems to have a view they want the basic limited IMCr and don't want to have to do anything else (or would not have been inspired to do even EnglishAl's private IR).
If this is a significant constituency, then it would be ideal that any future IR has a module which is similar to this and current IMCr holders can be grandfathered into. I struggle to believe we will get any traction in an IMCr converting to even a private IR (but that is just my view)