The ability to specify configuration options via parameters on URIs is very cool. But I also find it troubling. It appears to me that if there is a typo in my URI, there is no indication that the parameter was unrecognized and therefore ignored.
Closely related, in the admin console, clicking on a specific topic in the Topics page gives a form to send a message to that topic. I haven't yet had a need for that ability, but it would be really useful if the topic configuration was displayed on that page.
