I'm hoping "who remembers what" will be at least partially answered. I remember someone (Dan Slott?) saying we'd learn what MJ whispered to Mephisto in 2009.
So why in the world would Aunt May be upset with MJ?
It could be May just *thinks* it's somehow Mary Jane's fault, as May no longer knows Peter is Spider-Man. Peter proposed to Mary Jane, Mary Jane said no and moved to California. Sounds like MJ's fault to me.
And what Peter remembers about who knew his secret identity before Civil War... well, if the Spider-creators don't care, then I don't care.