I just think the ergonomics of symmetical/lowsticks is better, and seems like more people complain about fatigue on Xbox than viceversa (despite ~230% more PS4 users). In basic grip shared by both, moving thumb forward "wants" to move down (toward palm), and opposite for the opposite movement = least effort with symmetric/lowsticks. While assymetric/highsticks means moving thumb forward to stick now must move up, or moving thumb back to D-pad must move down, opposite of natural/least effort.
As for the claw grip, I feel like the ultimate version of that would be if you could have D-pad buttons on front or back of controller, always under finger while thumb is on stick. Fair to say, I think single piece / 8-directional D-pad is way to go, I guess fortunately for Dualshock that is simple to modify with cover over the standard 4x buttons.
Looking forward to new triggers and haptics in PS5 Dualsense, hard to say from descriptions so far, but sounds like it can add alot to games when used well.