The funcionality is fantastic. It took 5 minutes go get my breadcrumbs working where I wasted days trying out others.

What bothers me though is that in reality I needed about 5 hours to figure out how to put /blog/ infront of my articles (even though I studies the Readme file).

Side note: This module was the last chance to get my breadcrumbs fixed, ohterwise I would have given up much earlier.

Thtese are my enhancement suggestions/requests.
- Use different words for "switch". Much more helpful would be "switch to if..." or "Go to rule if...". A more precise expression also helps translations. The translation of my D7 insallation gave me the translation of something like "turn"
- For the switch opion, where do I enter the condition? I still don't know. (E.g. switch if argument 1 = blog)
- Don't hide the data input in separate steps. It's clean and minimalistic but very irritating for occational use. Bringing the input fields directlx next to the options would explain a lot and help the user understand what that option is for. There are only a few fields and buttons, so the UI won't suffer from clutter overload.

Besides this UI/navigation stuff, awesome approach.