I really like the suggestion about ordering by subjects, trying to gauge what skill level individual pieces were at in order to post was frustrating.
I do still feel like a Sketches/Experiments board should still be a thing though since people do like doing just sketches on the oekaki and still having it lets more rendered works stay on the front page of the categories longer. I feel like this board only became oversaturated just because people didn't know/didn't want to judge which skill-based board they should have posted in.
I also don't think fandom/fanart doesn't need its own board, all the content would be more organized if sorted by the content. I can see that having a sole fandom board just having everything and being a mess.