There shouldn't be this option: "Continue until the unclaimed coins are swapped:" because there are people who probably forgotten about 42, lost their wallet due to data corruption and could be used to troll, someone could say "There's one dent left! We can't continue until this dent is swapped!" There would be no moving forward.
This option means that miners will continue to mine the old coins and swap them for the new (
and sell every day) until the last coins are swapped. As for the us, we will continue as we continue...
obviously it is a bad idea to swap old unlimited coins that will be mined after January,
but why not to let people who don't read the announcement regularly and don't know about the swap, or have the wallet (on Cryptopia etc) which is stuck now, to swap their coins later?
like you said (fair):
I will let the people to swap after the January, 2017, if their old coins were not touched after the block #1990382...
would be a good option to vote.