Unfortunately I have to disagree. While I was also not a fun of the old document icons (using the app's own icon is surely a bad choice) , the new ones are even worse than those used to be.
I don't know about others, but most of the time I use either list or column views, and it is impossible to see the completely unnecessary labels of the extensions written on the icons themselves. I do not think we are often looking at 256x256+ pixel versions of the icons, so big dimensions do not count in usability.
The new document icons are just generic white sheet icons with some hard to tell apart tiny colored spots on them. Just look at my everyday view of these icons:
I would expect a company like Serif to do a better work than this. I hope they are going to fix these icons soon.
@Lmpessoa Your afdesign, afpub and afphoto icons are great! Clearly distinguishable even in tiny sizes, and that thing DOES matter a lot. Thanks for sharing!