Biker, I’m no expert by any means, but recently had my first custom footbeds made and cannot speak highly enough of the end result. They were expensive so before I got them I did a bit of homework and what I came up with was that the custom footbeds are designed to place your foot in the anatomically “correct” position, this is not the case with the standard mouldable footbed. Whether it makes any difference I can’t say, but I was certainly sold on the idea of the custom ones.
One more thing I’d encourage someone to look at if they were having difficulties in any area, again based on my own experience, is their alignment. For years I’ve been trying to get off my inside edges (I skied knock kneed), no matter what I did I couldn’t overcome this (very frustrating let me assure you). More homework and I decided to have my alignment checked. Sure enough, the guy in the shop told me it was about as bad as he’d seen in. Boot grind has made a HUGE difference.
I hope this helps. Like I say I’m no expert but this is just what I’ve found and what others have told me.