I'd say it is all about the seat. Not tried regular Y yet (catching BR315 later tonight) but I don't think the additional dish you get in Elite is worth any serious money. But I did sleep for a couple of hours on AMS-TPE, which I almost never do in Y on any airline, even if I'm in an exit row. Looking forward to going back in PL/RL though . So never really compared the fare to regular Y.

On this routing a P fare seems to be only EUR 90 more expensive though (one way). I'd say that is a no brainer. It's a somewhat unfavourable routing though, with a forced stopover on the way back, and on the way there too on most days. But there are some half-decent hikes and you can finish the day in a hot spring before heading back to the airport!