"As a user I'd like to set a default tag for a specific calendar."
I love the feature that one can use events from a specific calendar as a base for tasks.
In my case, I linked the work calendar. I also have a specific Tag "work", which is supposed to track all my working tasks. Right now, I always add that tag, if I use an event from the work calendar as a base. It would be nice, if one could just set one tag as the default tag for a specific calendar. And if no default was set, consequently no tag is added.