I doubt cancelling and rebooking rather than modifying would solve much.
I had to give this some thought. I think you’re right. There will be some that won’t want to risk cancellation, but those would most likely be - I have a partial week booked - the rest would just cancel if they didn’t want the week anyway.
With the implementation of the modify system and 2 minute job to walk, it’s the perfect storm which will only get worse as people think if I can’t beat them, I’ll join them.
I do think it would help if you couldn’t modify in system but had to place a call. It would cause inconvenience which would deter walking. But then again...it would cause inconvenience to those who aren’t walking. I think it’s to Disney’s advantage to play blind to walking rather than cause inconvenience with modifications.