I have some questions for anyone kind enough to answer.....

Ok so I binge watched it all. Loved it but not crazy about how it all ended and the way it was filmed. Too scattered and too many flashbacks.. Heres my questions:

Did Sally try to kill herself or did she die in the car accident?
What did Sally plan with Roy Gilbert? She was seen with him many times, and in secret.
Any chance Roy Gilbert couldve been Kevins real father?
How can Meg disappear and not be called in to testify? She couldve been the killer. You cant just bow out cuz you feel like it.
Did Eric escape jail and get shot and die? They showed the funeral but wasnt sure if it was all in Johns mind.
I look forward to anyones thoughts on these points..Thanks in advance.