It would be nice to be able to add wildcards to dispatcher rules. My thought was to help with the ability to setup a 'default template' for all tickets as they arrive.
I created a support ticket for this and it was suggested that I post it here.
In the interim, I have found a solution to setting most of the fields that I needed. For our 'type' field, I simply reordered the available types so the top one was my default. I then created a rule for all email going to our default email (firstname.lastname@example.org) and have it so all emails 'To' that address now have the Group & Agent set.