Pace's comment was in context of the IMC rating may not be obtainable after April next year. At the moment, if everything goes as expected, Europe is going to let the CAA continue to give out new ones for another 5 years.
FAA IR is easier to get than an EASA one. However you need to keep in current. If you aren't going to use the facilities of a full IR then it there is no point in going for it. However if you want to use an IR internationally you will need a full one.
Comes down to currency in my view. If you are going to use it from time to time to hop through a few clouds to do some VFR on top, go IMC and know your limitations. If you are regularly going to do long distance airway transits you need a full IR. IMC is easier to keep current with (legally speaking) but real currency is in flying time.