I'm not even thinking that complicated, for me I just experience 2 problems with outer.
1) I feel the throw angle is too low on my BH, and I often hit the ball into the net. I think I tend to hold a more extreme continental grip
2) I feel lack of hold on the ball with the FH opening loop. I never am sure if my ball is going into the net or going long, somehow the window or margin of error feels extremely small to me
I think throw angle is easier to solve, just try a higher throw rubber. I feel the same way about the FH, I compensate by brushing more and hitting less, which I don't really like. As mentioned above, I'm gonna try a harder rubber on the BH side to see if it works better with the HL5 or YSE, because I don't really want to try a softer rubber on the FH side of the Viscaria. It's already kind bouncy for my taste, a softer, more springy rubber would destroy my short game.