It would be useful if the Analysis Board had a takeback button (like in the games), in order to correct mistakes when entering a game.
See
http://en.lichess.org/qa/591/how-to-take-back-in-analysis-boardNever got any answer to this. Is it on the "list of things we may do one day" or is it not considered worthwile or am I just missing some way of actually doing it?
It is indeed on the "list of things we may do one day". But it's not may do, it's _will_ do -- it is definitely planned. As for when it will happen? There is no ETA I'm afraid, as this is a volunteer-run site. But in general, tertiary functions such as analysis are lower in priority than bug fixing and features related directly to playing.
There is a workaround: you can refresh the page. This will require inputting moves again, though.
OK, thanks for the update