I had an idea
What if we could take the bookmarked tags and group them up, so we could check one and get the results of all the associated tags with it? So like let's say I want to keep an eye on "#pencil" "#colored pencil" "#charcoal" and "#crayon", I could bundle them all into "drawing". So I could check one bookmark instead of four.
And maybe bundles could themselves be bundled
This would allow one for instance to have a single bookmark for the numerous global feeds