Disagree on the serviceable backup evaluation. If he was serviceable backup then there would be no need whatsoever to draft a free safety in the third round of the 2013 NFL Draft after drafting a free safety in the second round of the 2012 NFL Draft on top of moving former cornerback Devin McCourty to free safety.
Well, as was pointed out earlier in the thread, Gregory is almost certainly gone next year if not this year - his cap hit is too high for a back-up next year. He's not nearly as bad as you're making out (and I suspect you know it), and as for McCourty, well, he's a better safety than corner - in fact, I expect he'll be a pro-bowl safety soon enough.
So what if he is gunner. Kyle Arrington started his career in the NFL as a special teams contributor. It's not rocket science.
Cole may or may not make the team, but he won't be making it as a D-back with the depth they've now got there. Whether they keep him for ST or not is above my pay grade.
Yet the New England Patriots organization have recently cut a number of players after one or two seasons:
Jeremy Ebert
Lee Smith
Markell Carter
Malcolm Williams
Taylor Price
Ted Larsen
Darius Butler
Brandon Tate
Tyrone McKenzie
Kevin O'Connell
Terrence Wheatley
Chad Jackson
Where is the uproar for those aforementioned players?
I don't understand what this has to do with the price of baloney, sorry. They cut or keep based on need (and perceived talent, character, etc.). Right now, they need a third corner, and Dowling has the upside to be a very good one. If he can't cut it, he'll be gone. It's business, no uproar.
Heck, I thought Donald Jones would contribute this year, but...they saw differently.
You know, after watching almost 30 years of Pats football where a .500 season had me hopping for joy, I think I'll give the coaching staff of the last 12 years a bit of leeway and trust in knowing what they're doing.
All of that said, there's NO WAY I'd cut Dowling right now unless:
A: he gets hurt again, or
B: now that he's healthy, if he shows he can't do it
Seriously, you see a better option to play behind Talib, Dennard and Arrington?