Well done, and full marks to the Unthanks for spending a good forty mins to type such a long reply to explain and comment on this issue.
Personally I am one of the ones who love 'em. I wish they would sometimes take less time over singing a song or two from their repertiore, but I cannot fault their musicality and I have little or no problem understanding the lyrics they sing, or their choice of material.
Seems like a bit of a storm in a teacup to me. If you don't like 'em don't go and see 'em - if you do, but don't like the arrangements at the venue - don't go! If you want to see 'em anyway - try and make arrangements with the venue provider and if that fails then sue the venue providers if you are feeling 'victimised'!!!!
I think they are a breath of fresh air!
P