You all are overlooking the one biggest, most glaring change of all.
Given just the change of Snape falling for Petunia over Lilly, there is one major arsed plot change... Snape no longer has a reason to turn coat to the Order
of the Phoenix, and should remain a loyal snake face; let us not forget that it was only his unrequieted love for Lilly that drove him from the ranks of the
DE's and into Dumbledore's camp. If its her sister he loves so much instead, I see no reason for him to lift a finger over Lilly's impending
Demise...
Hear that thunder rolling till it seems to split the sky?
That's every ship in Grayson's Navy taking up the cry-
NO QUARTER!!!
-- "No Quarter", by Echo's Children
Given just the change of Snape falling for Petunia over Lilly, there is one major arsed plot change... Snape no longer has a reason to turn coat to the Order
of the Phoenix, and should remain a loyal snake face; let us not forget that it was only his unrequieted love for Lilly that drove him from the ranks of the
DE's and into Dumbledore's camp. If its her sister he loves so much instead, I see no reason for him to lift a finger over Lilly's impending
Demise...
Hear that thunder rolling till it seems to split the sky?
That's every ship in Grayson's Navy taking up the cry-
NO QUARTER!!!
-- "No Quarter", by Echo's Children