Let's give them enough time to solve some issues , better 1x a "long" time down and problems solved than 10 "short" times down and retrying solving problems !
Don't forget the site is on 24/24 , 7/7 , so maintenance has to be done somewhere in time.
And I'll be very happy if "502-error trading" will be reduced with this maintenance.

For me it's a very reliable exchange and that's what matters the most afterall.
Have some faith and trust , they deserve it.
However , I prefer a short downtime above a long one to.

yes, at some point you are right. but Kraken is not a small enterprise and they can allow themselves a test environment, where they can test the changes in the test environment and after SIT and UAT implement it in the production environment.
but lets wait a little bit longer...they are a trusted exchange. i remember back in time bittrex couldnt verify my account for almsot 2 months and my funds were frozen...