When looking through mods to add to a pack the "filter by" section is super useful for discovering new mods to play with, but is also very cluttered. I really like niche categories, like the "Twitch Integration" category, but having categories that are just mod names, and at best only useful for addons for those specific mods are kind of unnecessary, at least in the current age of Minecraft where many of these mods aren't even updated anymore like Thaumcraft. "Structures" could easily be merged under "World Gen" as most world gen mods add structures anyways. There are also 2 redstone categories. I think the selection of categories could at least use a bit of cleanup.