nicols2828, As far as I'm aware those of us in those European countries where Euro 6 has been adopted will only be able to register cars with engines meeting Euro 6 as of 1.September 2015. Maybe it's different in the UK I don't know. Here in Germany it most certainly is this way. My personal attitude, however, will not be to automatically expect that things will go wrong with the new engine.
Lets see how this new In(genius) engine will perform on XE and XF. But it will also be placed on new Evoque. Do you think they will risk introducing their 1st engine on 4 models with faults? I doubt it but of course some minor issues are expected.