Let me get this straight: "(+9.24%)" under "Prop diff." means payout is 9% greater compared to what the payout would have been using proportional method? If so, a positive amount means "good". In the "luck" column, positive amounts mean "bad".
So, it would be my suggestion you should color this column accordingly (orange for "bad", green for "good" - this has to be the miners view, of course

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That's correct, you received 9.24% more than you would have under Proportional.
That's a fine idea with the colors and I've added that to the block display!
One of the problems with the luck column is that there is no upward bound on "bad" luck, whereas there is a negative bound of 1% (or 0% if it takes exactly one share to find a block) - you can only have a -99% luck factor, but you can have a theoretically infinite + luck factor. So the color visualization is kind of misleading... if anyone has any ideas on how to improve the luck factor display, I'm all ears.