I don't follow your logic here, are you suggesting that all US airlines will be banned from flying to Europe because the crews have FAA IRs?
I don't think Fuji was saying that...I think the FAA IR isn't the answer because it just seems so silly to go to another country to do a rating that isn't valid in the aircraft of your home country.
Many do though and I'll probably be one of them soon. The loss of an automatic IMC rating from the FAA IR might see the numbers doing it from the UK reduce though.