I'm not worried by the cap right now although of course we'll have to take some important decisions soon.

I don't share the "let's cut Malik" thought, yes we have Dareus but he has to prove he's buying in for the long-term and he's at risk of being suspended for 10 games with his next mistake. Campbell while amazing isn't a younsgter.
Yes Jackson has an important cap hit but while he hasn't been brilliant in the run game he's been playing through a groin injury and yet he's on pace for a career year number wise: 28 tackles, 6.5 sacks last year, he's on pace for 32 tackles and 8 sacks this season and he often commands a double team when rushing.
And I'm positive that with Dareus in he'll probably be more rested or face less double teams and those numbers can improve further in the second half of the season.  Of course if we keep opponents again at 37 plays per game that won't happen LOL.
Jackson will be a conversation but I really don't think he'll be cut after this season, you just don't cut players of his calibre unless you really really have to.

By the time we'll have Ramsey, Jack and Ngakoue (yes, it's insane we got them all in the same draft) contracts coming up lots can change, Campbell will be 2 years older, will have to see Dareus motivation, Malik Jackson will be at the end of his contract, probably even AJ Bouye contract will be evaluated especially if we develop a CB during these years.

Hurns has a big contract but a lot will depend on the development of Cole and Westbrook above all. As long as on offense we keep ARob, we draft good Oline and we get to keep most of the talent on the defense together we will be fine.
Then there's the Bortles situation but I'd say let's see how the rest of the season goes first.

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