They are steering clear of calling it Premium Economy
I have to say as someone who many years ago used to travel from London to Bangkok in the days when I was younger and money was tight I found the Eva Air premium Economy to be excellent value for money when it was introduced (it was something in the region of £100 more than economy in those days) and were I still living in London I would probably still be flying with Eva although these days in Business class as the service was always excellent and I lost count of the number of upgrades I got to business.