Of course, you saw that It worked for me last season and now you are "stealing" my formation as well... Good job!
Nah, just kidding!
This is the "thing" I noticed as well last season. Sticking to one (or two formations) seems to be the best choice. Also, not changing the style of tackling (easy-normal and hard) seems to be a thing best "left as it is" and avoid to many injuries. And "too much change in too short a period of time" seems to be bad in T11, while small improvements and standardization are the best way to go.
Does your newly signed players get good ratings? Saw also that you are almost finished with the PT, did it go well and how many boosters did you "burn"?