Overall, from a team perspective, I'd rather trade Randle and re-sign Morris. Morris is more versatile, more of a leader, more of a 2-way player, just a bit old for our squad, but you always need vets to lead the way.
Morris an easier guy to build a team around too. Though by the time Mitch, Knox, RJB and Franc become any good, if ever, Morris will be a greybeard. But he could be a solid transitional figure. Morris would love a long-term contract and home, and he has a hard-nosed Knick vibe to him.
I am profoundly ambivalent about Julius with a tinge of distaste (gee, you think that sentence might rub chip's fur the wrong way?). Randle is a throwback, a one-position post-up bull with shoddy defense. His 3-ball which was coming along last year has deserted him. Mr. Versatile he's not. Fairly solid at what he does, but hard to build around his limitations (which include blackholeism and turnovers).
Is Randle going to become consistent on 3's or play average D? I don't see it. But if so, that'd make him more useful and I could be on board. Otherwise if he remains, and remains as is, you need to bring some guys in who fit around Randle (shooters and defenders), and preferably bump him to 3rd option where he could thrive. But is Randle really a guy you build a team around?