Board Thread:Questions and Answers/@comment-30771283-20170103172605/@comment-5774380-20170103200525

This topic has already been discussed several times in the past. Isayama can't choose his own publication rate because the manga is published in Bessatsu Shōnen Magazine which is a monthly magazine, therefore the manga is monthly as well. And a weekly manga means less time to work on each chapter and more filler. So no, AoT would definitely be worse if it was made into a weekly manga. It's better to wait more time between releases if that means less pressure on the author and more quality.

Plus it would make no sense to make a change like that at this point now that we are on the last arc and Isayama has the upcoming events already planned. The manga will end the next year and fortunately it will remain as a monthly series for the time it has left.