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I would say change it to often confuse only.

A final solution for a longer time would be needed. And if it's flexible up to 13 weeks, everyone can choose how long they want it.

Ye ofcourse. But HF isn't often :D

1 week is just way to radical if you ask me.
Not sure anyone would choose 13 weeks on their owm if they can do 4 xD

it can be also 1 week and 4, but i think it is a good middle way, because you can choose all advantages of 13 weeks ( security) + all from 1 week. In general i like it :)

I think you might be right :p

It could be a feature which requires your active or even master key in order to change the length of the powerdown