I've been annoyed by the messy timeline on Chub for a long time, so today I spent most of the day writing a userscript that helps clean it up a lot.
Features
Marks favorited cards and collapses them.
Fades out cards that are updated rather than uploaded for the first time.
Marks in cyan the reason a card was added to your timeline, so cards from users you are following have a cyan author, and the tags you are following are made cyan and sorted first (and if they're not there by default the other followed tags that apply are added too).
If you have favorited an original card, forks of that card will have the original link cyan too.
Replaces the drop-down button in the bottom-right of each card with a trashcan, to permanently collapse that card (you can unhide it by clicking the collapsed card or cleaning in your userscript storage).
On character pages, highlight discussion if it has entries.
Show character rating in discussion header.
Hide gallery, forks, and public chats if they're empty.
Optionally hide related cards below the current card, disabled by default, simply change const HIDE_RECOMMENDED_CARDS = false; to true to enable.