itīs not really surprising, it isn't the kind of song to get #1 on radio anyway, but it could've done a lil better with a video. but no, the GP nor pop radio clearly wasn't here for it in the way they've been for the bigger Adele singles.
it remains a high quality song that is loved by both critics and fans, regarded as an Adele-classic and it made the album keep selling even more, but it will barely do better than RHI or CP on the charts...
given the circumstances, not really a flop but yeah, underperforming. Adele didn't really seem to care that much either, hence i don't want to call it flop.
it may linger on high on the AC formats tho.
and no more promo is up anyway, cause the ****ing tour is coming!
but yeah, just to keep the era alive, i think coming out with either SML or WUTB sometime in spring, with atleast a bit of single treatment, would be good! no more ballad single.
I would say she will do I medley, kind of... Starting with the ICONIC "hello" and sing it til the first chorus... then change and do WWWY full
WWWY is not greater 
? Its your personal preference so no need to be shady sis
Its pretty much in the middle of the album for me