Yup, that is definitely 1 phase for sure.
Biggest change point from the 1st 3 weeks to the last 2 that has been mentioned already on this forum and so true = O line execution.
The first 3 weeks, the O line looked like the best unit I have seen Allen have and it showed. The last 2 weeks, the O line has looked like one of the worst units I ever seen in the NFL which was Allen's rookie year.
Our O line has gone from the best in the league to the worst in 2 weeks.