Traditionally, lines are adjusted 3 pts to a neutral field and then 3 pts for home resulting in a 6 pt swing.
This is a long-standing principle of line setting.
We are assessing 8 here.
I obviously implied 14 weeks have passed since week 1 (and shouldn't have to even imply such a thing since it is so obvious).
So the standard adjustment all things being equal should be 9.5 and 10 for even greater home field advantages.
Then you compare the standard adjustment to the current line given all that has transpired.
I addressed all that has transpired by analyzing quality wins and covers over the course of the year and their performance in the Jets game and the fact the Dolphins would be in a tailspin if they didn't get that last-second win vs. the Jets. Oh, and there was even more than that in the write-up. In fact, I have gone as far as to justify every single point in a spread of NBA write-ups, so you need not address me about lines and their value.
So the 9.5/10 is actually far more reasonable than 8. That explains a lot doesn't it? If not, I can't help ya.