Hightower needs to be get paid. We'll have the 5th highest cap space available and he's one of the players we need to keep, especially if there's turnover at other positions on defense; he's the foundation of that unit right now.
Butler needs to get paid as well, but I'm not sure if we'll use the franchise tag on him. He's done everything asked of him, played through injury this season, never complains, never brings up his contract situation; he just works hard and brings it every single game. Butler needs to get paid to show that if you buy into the system and do your job, you'll get rewarded. He's a top tier CB in my book.
As for Bennett, I'm pretty sure he wants to get his payday, but at the same time, I feel like he appreciates what he has with the Patriots. On our end, I feel like we do need him. I attribute his lack of production to his ankle injury and for the most part, we never got to see him and Gronk on the field together healthy. I also didn't see a ton of other tight ends available in free agency that excite me, other than maybe Jermaine Gresham. Having a TE behind Gronk is essential at this point.
Regarding Blount, I don't see him coming back and I think we'll ultimately be fine without him. I was disappointed when Vereen left to the Giants, but we filled his role just fine. Blount is great to have to close out games, but I don't see the Patriots paying what he'll get elsewhere.
Other guys I'd like to see back that we may end up letting go are Logan Ryan and Alan Branch. They both have pivotal roles in this defense and both ended up having great seasons overall. I used to not like Ryan at all, but he turned into a nice CB opposite Butler. I'm not sure how I feel about Rowe sliding into Ryan's spot and Cyrus Jones sliding into the nickle corner slot. But then again, this coaching staff made it work with this unit, so who am I to doubt anything at this point.
With Branch, he's a nice run stuffer. I don't know what kind of contract he'll be able to demand, but for continuity purposes, which mean nothing with this team for the most party, I'd like to see him return.