I really think we're tripping over semantics. I consider my 'aim' as changed because my stroking path changed once I realize how much squirt/whatever is going to effect the CB. As far as I'm concerned. If I'm no longer launching the 'arrow' on the original path (aim) then I have altered said aim.
My perception of the amount of squirt/whatever is at it's best when down on the ball. At this point, I have the best line of sight to judge adjustments. Doing so while standing is guess work IMHO as you simply aren't in the best position to judge squirt/whatever.
I also don't consider the OB path to the pocket/whatever as apart of the 'aim'. That shot line is written in stone and hardly ever varies once established. I only concern myself about the CB and what I need to do with it so I can make the pot, and control the carom.
The thing with best practices in pool, is everyone has their own spin on it, (see what I did there

). If I was teaching a beginner/intermediate level player, I'm not sure I would suggest altering shot path (aim) when down on the ball. That said, I also would discourage a style of play that would required such spin and tight shot lines wherein they even need to make these adjustments.