I'm generally one of the last people to succumb to "doom and gloom" predictions, but I am personally concerned enough about the current situation that I have delayed booking a November trip to Seoul for my family and am considering alternative destinations.

I've been here a long time and it's always just bluster.
November is cold in Seoul. The best times for fall foliage would be early to late October if you do decide to come!

I hear you. I go to Asia multiple times a year, and have been through Korea more times than I can count. What worries me this time is the unpredictability of the American response to potential further provocation and the N Korean counter response. It really could be materially different this time. I hope it isn't, for your sake and for the world's.