Its a double edged sword. The UK is a relatively small market in which lexus doesn't do that well in so they don't care.
What they don't seem to realise is that their poor sales come from the utter lack of mid range engine choices. Anyone wanting a sporty luxury sedan or coupe with some decent performance will go get something like a 3L bmw because the IS hybrid lacks power and the RC-F is a higher end, more expensive pick.
The 350s are probably the most popular choices in the states and for good reason, they they chose to not sell the best option to us in the UK.
But if i ever have the money, I'll just import a IS500... or move out from this ****ty country.