[mst]

Also, if I need to remember which values I set for Auto-ISO 1, 2, 3 and need to dive even deeper into the menu to find out, I feel that's a poor concept.

You don't have to remember them. If you quick switch ISO by assigning it to any of the customizable Fn-buttons (as described above), a scrollable list of all ISO settings shows up on the rear display in the live image, including the 3 Auto ISO settings. When selected/highlighted, all the values are displayed right there next to the entry, no need to dive into any menu.

I guess it's a matter of taste if one prefers the Nikon approach with the banks/user settings. For me personally, they store too many settings, of which I usually only one to change one, not all of them, so I rarely ever use them since they simply don't fit into my workflow. And, while we're at it: I also don't use Auto-ISO at all