M-ONGO, forgive me, the actual requirement to hold an EASA licence is not yet in place as you say but, as MJ point out, the clock si ticking and a plot with an FAA only licence is not going to get a job on a European based aeroplane.
At work we have insisted that FAA pilots joining the company have to achieve an EASA Licence and they have to pass it by a defined date. Failure to achieve the licence means their job is gone.