How did things not change in the secondary? They added Talib, Dennard, Ryan, Adrian Wislon, Tavon Wilson, and Harmon.
On top of that they brought in Cole, Ebner for ST roles, and moved McCourty to safety.
How many changes in the past 15 months would you have liked to see? I just listed 8 new players and one more who's position was changed since April of last season.
Regarding Dowling--why would you want to cut your high 2nd round pick if he's finally healthy and under a cheap, rookie deal?
Cole--may go....that will depend on special teams battles and be up to Belichick, but an argument could be made (although I personally wouldn't agree with it unless none of the new guys can take over the role).
Gregory--what kind of production do you expect to receive from the savings of approx. 700k that you'd get by cutting him. There's a much better argument towards cutting him after this season and using him for a rotational role as a #3 or #4 safety for one more season until the younger players are ready to take over that role.