Woah, thank you! That's a really insightful and interesting reply. You're right, the way I suggested would lead to characters shifting pretty regularly as their aspects are changed when not used, whereas I can totally see how your rules as written help the players really internalise the driving forces of a character which would definitely help them jump off from the character sheet. Once you've really understood the aspects, I bet it really helps play move outside the box whereas the rule I assumed would very much keep players in the "hmm I'll check my character sheet" style of play as the aspects would be shifting so often. Oof, game design is a brain-melter I've no idea how you do it.
Thank you for such a clear explanation and for how quick it was, too! I'll definitely pass this module around and check out your other work!