Note to self: don’t look to fix what’s not actually broken.
So Orvis theme isn’t as mobile friendly and hasn’t been updated to be such. It works on a PC screen. I rarely have any crucial need to access the blog from my phone or other mobile device. Using another theme ultimately means tweaking so much to get stuff to display correctly in new layouts, modding themes, etc., that it’s not worth the effort.
I think the desire to change themes was for the sake of change more than anything else. Who cares if others find it hard to navigate. Those who want to use the site will easily take the time and effort to learn to do so.