Indeed, I feel the same way. I used to be a big user of CrashPlan, largely because it had a straightforward UI: highlight a bunch of directories; choose a backup destination; choose a backup frequency.

I do like the idea of being able to tune and configure things from the CLI. It was frustrating configuring CrashPlan on a remote computer.

With that said, I feel like both should be possible. Even just a basic wrapper GUI would be a start.

Edit: and some basic searching has lead me to lots of options! Time to do some more research.