The lady -- not dogging her playing, I'm sure she is fantastic -- showed a hockey sticked 4th (I think she showed a picture of Auer). Yes, that happens but it's only temporary while you are fully extended, it doesn't stay in that position. It should curl back and be over the bow stick with a curve from the wrist down to the tip of the 4th.
She said that the fingers don't curl up when you approach the frog, they do.
Not necessarily related to the bow hold but she held her shoulder and arm high, out of plane with the bow. Now, maybe that's how she learned to play but I like to keep my arm and bow in plane with each other. I tell my students that their arm and their bow should "fit inside a pizza box." Helps greatly with stability and smooth motion.
I think dismissing the RBH as having "LOTS more" flaws than the FBH shows a lack of understanding of it. You can play with great power, nuance, speed, and control. It's a great bow hand.
As an aside, I notice when my students screw up the RBH, it kind of turns into a FBH.