I think there is a notable group of Season ticket holders just don't use the ticket exchange system. I'm not sure how they could make it easier for some, perhaps through the introduction of a dedicated phone line for ticket exchange assistance, especially catering to those less tech savvy.
If demand for season tickets is genuinely as high as some in the club claim, then I believe their is merit in ensuring that the limited number of season tickets available go to those that can attend the most games, or are prepared to make the effort to use ticket exchange when it's available. If the game doesn't go to ticket exchange then that's a free pass.
It doesn't have to be quite as strict as the Bradford model, possibly the culmination of eight games missed in a season, without any effort to use ticket exchange(when available) or any special dispensation for health reasons, could result in losing the right to renew for the following season.