It would only take one procedure and as it will be above MSa it wouldn't require expensive surveying etc to design.
I may be daft but why would you need a separate procedure to descend to the MSA? You can just descend on track to the MSA, can you?
Anyway, adding an EIR cloud-break procedure for each of the thousands of airports in Europe is still going to be a lot of money. And I don't think it's far from trivial as there has to be some sort of STAR towards that procedure from all directions, and some sort of missed-approach procedure that brings you back into the airways (like a SID).
And obviously those STARs, the cloud-break procedure itself and the missed approach procedure all need to either tie-in neatly, or remain totally separate from the current full-IR procedures, so that they can be executed in parallel or sequential, without causing conflicts, even in non-radar situations.