Larian Studios Forums Baldur's Gate III Baldur's Gate III - Mega-threads and Guides BG3 Party Movement Mechanic

Because it's absolutely, irredeemably abysmal at its core and any attempt to "salvage" it basically requires to dismantle the parts that make it bad, factually turning it into a different system.
Saying, for instance, "It wouldn't be so bad if it allowed group commands and formation controls" is factually equivalent to say "It wouldn't be bad if it was completely different".

The button shortcut that allow to group-ungroup the entire party was a nice addition that made this mess a lot more tolerable, but it's not enough to make it good.

Also, no, "working better on controllers" shouldn't be the design goal at all.
Both because the controller UI/control system can afford to be its own thing (case in point: WoTR basically marries DOS 2 control scheme on a controller with a traditional RTS system on M&KB) AND because some of us (me, for instance) have absolutely no interest whatsoever on playing this kind of game on a controller, to begin with.
So what we want is a better M&KB system, not support for alternate peripherals. These are different topics of discussion.