I agree with 90% of this article. However, I differ on one point: as far as I'm concerned, the "File, Edit, View" categories are anachronisms from another era. They make sense in Microsoft Office†, but fail to cover the breadth of software in use today.
I'm currently using Firefox (on OS X, where it still has a menu bar). The first three options under "File" are "New Tab", "New Window", and "New Private Window". Does it really make sense for any of those to be under "File"? I understand, historically, why they ended up there—each document used to correspond to a new file—but tabs fundamentally are not files.
I'll switch over to OS X's Messages app‡. The first two options under "File" are "New Message" and "Open". The former starts a new conversation, and the latter let's you attach a document to the current conversation. Those actions aren't related at all, except in that they kind of relate to the concept of the word "File", depending on which metaphor you're following.
So, I don't think there's anything wrong with mpv grouping its menus differently from evince. They're doing different things and shouldn't have to follow the same categories.
---
† Which is definitely (sarcasm) why Microsoft Office decided to replace the traditional menu with a ribbon. Again, I agree with most of this article.
‡ I'm running OS X 10.9; Apple may have made changes in newer OS's.