maybe I am not reading this right but we are not talking about the EIR but the restricted IR which will be issued to IMCR Holders.
Unless something has changed ( would not surprise me in the mess of EASA regulating) An IMCR will be validated onto a EASA licence as an IR restricted to enroute airways only?
An IMCr included in a non-EASA licence will become an IR(R) upon conversion. The IR(R) is
identical to the IMCr in all respects; for example, it is only valid in UK airspace. It has nothing at all to do with the 'EIR'.
If accepted, the EIR will be an EASA-only rating which grants en-route IFR privileges in all classes of airspace within the airspace of 'EASA' nations.