M&S went to shit - well, at least being average - pretty fast.
After "Sigh no more" and "Babel", for some reasone they thought changing their signature style significantly (an alliteration, neat) was going to work.
It did not.
And they know it - whenever you're going to a concert, they pretty much avoid as much as possible playing anything from "Wilder Mind" (i like to call that one "Milder Wind") or "Delta" because the crowd will be unfazed.
Edit: thanks for the downvotes, why-so-fucking-ever.
Also, if you have heard anything of the last 2 albums - do you really think they still have a spot open for someone playing a banjo?