Tested on our R5 and RED Raptor, the RF 50mm 1.2 far out resolved the EF 50mm, which looked out of focus in comparison. Resolution isn't everything, but the EF also suffered from more chromatic aberration, fringing, and busier bokeh.
I don't know. Great lenses are expensive—even EF lenses like the 35mm 1.4 ii or the most recent EF zooms. The RF are nearly the same price as those—and the Sony counterparts as well. If you're complaining about the RF, you might as well complain about everything else.
About the RF exclusivity, we'll see how it plays out. Still see a ton of 3rd party RF lenses being released on B&H.