What would this feature do, exactly? Your crossbar fills up as you get new skills, and for most jobs you'll need most of them, if not all, and you'll need at least two full crossbars for combat skills and another one for items, mounts, markings, etc. Some automated algorithm deciding which skills go where wouldn't really help much.

I do think that Expanded Hold Controls should be enabled by default and explained way better ingame, because enabling it is the single biggest quality-of-life improvement a controller player can give themselves.