I am currently encountering usability issues.
The entries in my taxonomy menu point to a term view that has two page displays.
The first display takes one argument, the name of the term:
The second display takes 2 arguments, firstly the name of the term and secondly the name of a node to show:
This way, I can have an overview page for the term on the first display, and a node-related view on the second display.
The problem is that, since I specify my destination path to be "mysite.com/vocabulary/%TERMNAME", the menu trail will not stay active in case I add another argument (mysite.com/vocabulary/%TERMNAME/%NODENAME).
Taxonomy menu trails could solve the problem, however, at the moment the path to the term view is hard coded and only allows the path to be "node/%nid". It would be a really nice feature to be able to specify a custom path to the term or even multiple if possible. This might solve the active menu trail problem with term views once and for all :)