If I click on a tag that does not yet have a name, but $tagbase is set, it would be nice if the location suggested is $tagbase/<tagname>, not a subpage: <current>/$tagbase/<tagname>.

This only seems doable if the tag link you click on is in the "Tags:" footer, or is added with a taglink directive. Think that's good enough? --Joey

yes, that would be better! --madduck

See also: tags base dir not used when creating new tags