If you're going to cut them this year, why would you use a post-6/1 designation? Why would you be so eager to kick the can down the line into a season where Hightower and Jones will be commanding major raises on their fifth year options, and where the Pats will have to extend or replace Solder while Collins, Hightower, and Jones are impeding FAs? If the Pats have decided that they can get by without Arrington and that those guys need to go for the long-term health of the cap sheet, then the Pats are much, much better off just eating the money now, rather than hurting their cap number next year by cutting these guys in a 2016 cost-neutral way and then having to pay their replacements.
You seem to be advocating for systematically cutting guys post-6/1 in order to squeeze under the cap this year and kick the can down the road. While that cap strategy is at least slightly viable when the cap is expanding dramatically every year, the end result is almost always that you gut the middle of the roster, tread water at the top, and rapidly decline as a result. I really, really don't want to watch the 2016 Patriots turn into the 2014 Saints.
Instead, I think this is a pretty good year to bite the bullet if you feel that you have to. Cut Wilfork, let McCourty walk if you have to, sign Revis long-term because he's an incredibly rare talent and the rare kind of guy who's worth that money. I would've let Gost walk and used his $4.5M elsewhere, but apparently I'm the only person here who feels that way. As I see it, right now priority 1 is getting Revis under contract. Priority 2 is setting the team up so that it can comfortably extend two of the Jones/Hightower/Collins trio next year. If this means using a first round pick on a LT this year so that Solder can walk in FA after this season, then that's a pill you have to swallow. If that means cutting Mayo knowing that you only save a few million by doing so, then fine. At least you clear his cap figure off the books now so that you have that money to pay to your younger linebackers next year.
And lastly, if you're going to clear up cap space now, you do it in a way that won't push more money (in the form of current contract plus replacement contract) into next year. I would rather cut Browner for no dead money and hope that Butler/Dennard/Ryan can replace him than post-6/1 Arrington and Amendola, pay their replacements in a way that hurts next year's cap, and still save a million less in 2015 than Browner alone would.