Mike:
I don't think wanting to get the highest total on the roll (wanting my character to succeed to have more control (or is this really more or just an ephemeral stroke of feeling powerful?)) and acting purely on my vision of him/her and the situation produce the same thing (the same move or non-move action) every time. Is this one any clearer now?
In other words, I think, they have more to them ("real people" and AW characters) than their stats to base their decisions on.
Stefoid:
Why have a psychic maelstrom?
I think that's mainly for color reasons and whether it exists or not doesn't have a major/direct effect on resolution or the things I'm currently probing into. So I can't answer your question yet.
I think when you campaign, and this is a game supports campaigning, the general theme is one of rising stakes, rising challenge. For balance, you want your characters to improve at the same rate the challenges do.
I don't think campaign play must groove on this thing which is a strong contender nonetheless. I may be mistaken, but I have a feeling about Improvement not being about balance, not on purpose, at least. (Though it could be as it can fill some permanent stat damage gaps.)
John:
Good one about escalating stakes, but I don't know if/how Improvement brings this to us.