Fun fact you will also get a higher dose of radiation taking North Pole routes
It only matters for very frequent flyers (i.e. people who put in almost as many hours as flight crew).
For your average Joe that barely flies much, it won't make any difference.
Yes it does, but you don't need to worry about that.
There are already procedures in place for "normal" operations.
It only needs a few tiny changes to take into account the arctic route, and I'm sure all the airlines have already done that.
Basically they only need to tweak shift rotas a little. For most airlines you won't even notice the impact on flight scheduling.
Well, you were very welcome to answer the question yourself with fewer words.
I note the distinct lack of an answer from you though.
Or maybe use a polyethylene layer?
But also, on the scale of things to worry about in life, this is way down there.