My point was that an EASA license is probably not going to meet state of registry requirements i.e. 61.3.
For example an EASA license issued in Germany will be good for an N-reg in German airspace but won't be any good for the same N-reg in UK airspace. There are two FAA OCC opinions out on this already so I consider this old chestnut done and dusted.
The EU is not doing anything illegal requiring this, in the same way as it would not be illegal to require pilots to wear pink underpants while in EU airspace, but it is bizzare that licenses will have to be obtained which are simply inappropriate for the aircraft under ICAO (state of registry) requirements.
They may as well require the pilot to become a chartered accountant... it's about as relevant.