So I did some research on the Michael Thomas slant route drop off.
It appears that MT has run 138 routes so far this season. Nick says he has run 10 slant routes. That would be 7.2% of his routes.
For his career, 9.0% of his routes have been slants (second highest rate in the NFL).
So if he had run 12 slants instead of 10 he would be right on his career average. There's a lot of things broken in the offense right now but I'm not sure his slant route rate over a small sample size is all that meaningful yet.
If Nick used different numbers, I'd love to see them.