I’m so pleased this thread has taken off.
I must admit that although I meant it as what songs have got better live, it’s also interesting to see what has got worse live.
For me then, What It Is live doesn’t match the studio version. I’ve got a bit fed up with it live.
Regarding SOS live, my first tour was 2008 and so I’ve only seen it as a four piece. I’m not enough of a guitar player or MK nut to be able to tell the difference in his playing between 2008 and 2015 so have enjoyed all versions of it.