Question Author
I actually posted a query on another site and got a response within the first 24 hours that suggested that many like me had overlooked it. Those people who did respond were against the change in its present form.
As for your second point, that is debatable. The site provides a service, but I would suggest the service is more than just a question is asked and receives an answer. The answerbank exists both for those who ask and those who answer. The answerers, some of whom are housebound for various reasons, get pleasure from answering and this pleasure would be lessened if the proposal goes ahead in its present form.
The questioners often get first class explanations of why an answer is what it is, thus enabling them to improve their skills, leading to greater satisfaction in completing the puzzle. Again this relies on the answerers and I think there will be a drop in these explanations, if people doing the same crossword or quiz just swap answers.