Same here. For me, but moreover, for less tech-savvy users I have the charge of taking care of. (And I can’t wait to for the Improvements to mount experience to roll out 
)
@jkowalski while I get and agree with 2. and 3.
I’m not sure about 4.
How one would reconnect to temporarily disconnected repo?
About 1. I get that user needs some starting point. But I’m wondering if a default non-removable repo is the way to go. The very first time I opened KopiaUI, I was welcomed with the “Setup Repository” window listing providers. This seems more approachable to me.
And yes, Kopia Server should appear in the Provider pop-up menu.