Nice! Congrats on finally making this plan a reality! Hopefully everything will be stable from now on and the crashes that gave you headaches will be gone. Also, not entirely important question, but, will the switch with help button between L2 and Select button be optional at some point? Not that it's needed, but, it's kind of a habit having it mapped on select button. I had a thought about mapping the speed up toggles on L3, just like PS4 release, and returning help to it's default mapping, that being select.
Edit: Some of those PS4 icons would look neat too, like the X3 icon appearing when you speed up, but i imagine that's something that will be hard to do.