I agree, although I'll freely admit I haven't tried to use the other features all that much.
However, I do find myself a little uneasy with the key management aspects too. The official keybase CLI package being ~500mb when installed, the background server, etc concerns me. The alternative of using curl with a heap of largely inscrutable commands seems unworkable¹.
I wonder if anyone has worked on an alternative, and easy to inspect, client to interact with keybase for just the key management aspects?
1. I largely used the curl method, but suspect very few others would.