The shorter period of power down is a welcome move. Additionally, there should be some mechanism to compensate the hive power given to someone who is using shorter period. Someone will provide this power to the one looking for shorter power down. There could be established marketplace
I would say it is dynamic.
1 week or 13-week power up doesn't matter as long it is longer powered up as 13 weeks for the full gov power votes.
So it is only because of security aspects, everyone can choose the time they want for power down, to become access to funds.
A long-term holder voting increase could be a really cool thing, but I don't know it would be much technical work :)