I only have one thought (about this)
What always gets me is the use of the plural in, $:/tags/blah. My brain wants $:/tag/blah You know, like $:/state/... not states.
I mean, obviously, it doesn’t really matter, it just bugs me a teeny weeny little bit 
Think of it in terms of the list field of that tiddler. Shadow tiddlers like $:/tags/blah have a list field of all the tiddlers for blah so you can add, subtract and reorder them. So it makes perfect sense for the tiddler to have the plural ‘tags’
Ah, no, you’re right…
LOL. But then there’s the plugins “space”. I’m perfectly happy with $:/plugins/blah.