edit: with the issues of Stylish and user data, I've not updated this thing/ I can no longer confirm if it breaks anything or now.
Well'p, I'm in the camp who was not a fan of the new thumbnail system. Last night I whipped up a solution using Stylish and posted it into the forum thread, but was suggested I post it here as well.
https://userstyles.org/styles/116050/weasyl-hip-squares-200x
AFAIK a few other people have their own Stylish themes as well. If you see a problem with layout on this one, send me a note and I'll get on it, be sure to let me know if you are using any others so I can check for conflicts.
Please note that this does not restore the old style, it simply aligns them to a square grid layout for those of us who have trouble when browsing through thumbnails of variable width in rows.
Link
Rowedahelicon
While I do like the new layout, thanks for doing this for those who don't!