The regionalised teams scenario (Option 1) is the only viable alternative for me.
It means that those who have worked hard to get a good team ethos will not see that hard work destroyed and the smaller groups will still be together albeit as part of bigger teams. I imagine that APAT would be able to find out the average number of runners from each club last season, so should reasonably easily be able to ensure that the new teams are of similar numerical size. It would also make sense if APAT looked to run a live event in each "region" so everyone gets a "home" game.
A "team" comprised of 15 people randomly assembled from all over the country is not a team for me it"s just a group of individuals put together - It"s like something off the X-factor. Surely the individual should choose whether he wants to play for a certain team or not - not just allocated into Pot C at the whim of someone else - Not for me thank you.
I do think with only one division, there is some scope to alter the team/individual dynamic with regards any possible added value. For example the top three points scorers from the winning team get added value seats and the top three individuals (excluding the top three individuals from the winning team) also get added value seats. This means if a similar scoring system is used as last year, individuals will nearly always have a reason to turn up, even if their team is doing badly.
I also think we need to remember the key point of APAT to recruit more players would be better served by the regional format.