A friend of mine has flown the last three times with EVA Air from Schipol, Amsterdam despite living in the UK. He is paying around £850 return in premium economy. For the similar flight from LHR it is around £1,700+. There are of course additional costs involved getting to/from Amsterdam but he still makes a significant saving. The flight times are not dissimilar to the EVA flights from LHR. This does involve staying a night in a hotel near the airport on the return leg as there are no suitable flights from Schipol back to the UK at that time in the evening. He did say Schipol airport itself is a bit chaotic and the EVA lounge is crap but the savings are worth it in his opinion.
I always used to do premium economy both ways (paying around £880-£950) but have now started flying LHR to BKK economy (I am guaranteed emergency exit window seat at front of economy as I book well in advance combined with the Gold card). I am happy to do this as the flight departs around 9.30pm. I'll have a few drinks in the lounge, get the emergency exit talk from the stewardess out of the way, pop a pill and sleep most of the journey. I then return premium economy and every second or third flight upgrade to Royal Laurel using points. Even the economy outbound/premium inbound is still costing around £1,400.
EVA are not the 'bargain' they once were but I continue to use them as I like a direct flight, the times both ways suit me and the rewards program I find useful.