This seems pretty consistent with the message (direct and "rumored") throughout the offseason: They all believe there's room to grow internally, and that is where the biggest positive impact will come from (if it comes) in 2022. No big splashes in FA this year. If the Pats are noticeably better in 2022 than they were in 2021, it will be because the 2nd year guys took 2nd year leaps:
Guys who played well in year 1 but could always be better:
Mac
Bourne
Henry
Stevenson
Barmore
Mills
Guys who contributed at times but didn't meet expectations:
Agholor
Smith
Godchaux (I personally think he was fine, but I know it's split on this board so I put him here)
Guys who barely played, either due to injury or development:
McGrone
Perkins
Bledsoe
MacMillan
Wade
Sherman
Anderson
All of them either 2nd year in the league, or 2nd year with the team. Not all of them will be better of course, but the hope is that several of them contribute more in 2022 than 2021.
EDIT: Added Mills, Godchaux, and Anderson.