I haven't heard back from Ash but I have received an email putting the opposite point of view, part of which is quoted below (with the sender's permission). It makes interesting reading
"I wish to say that one of the reasons for people opening a new thread is that they do not want to see all the answers already given, as that spoils the crossword for them. They should have the right to open a new thread if they wish.
They could , of course, add their question to the existing thread without peeking at all the other answers, but their question may have already been asked. Someone will then moan that the question has already been asked and that they should have checked this.
The other crossword forum (answerbank) has no problem whatever with multiple threads on the same crossword and no one is asked to stick to one thread. There is no pettiness there if someone asked a question that has already been asked by someone else, and they are all very light-hearted .
I agree with chiaroscuro’s post @ #14 that people are just getting their knickers in a twist ."