I have used EVA and they are ok and a good price and relatively better in economy than in busy or premium economy.
I have never flown BA to LHR for a connecting flight, too big a chance of my luggage going AWOL.
At least KLM and CI have sorted out their problems in that respect since I stopped using them for a number of years after they p'd me off.
AF premium economy was great except for the non-reclining seats (though that may have changed recently) and VERY variable fares and I still remember the girl at NCL check-in desk trying to sort out KLM economy to AMS followed by business to BKK. I didn't think pockets could hold that many bits of scrap paper!
It didn't seem to be a problem at BKK on the return.
BA and TG are far too expensive to use long haul if you want a bigger seat.