The Knicks will likely trade Randle because they've already proven they are still a great team without him. I mean, Randle's contract is huge, and the team could sign more players if they let him go or accept a trade. And yes, it should be Brunson who leads the team as his leadership is very effective. As a point guard, he makes great decisions that get everyone involved. If they were healthy last playoffs, I think they could have given a good series to Boston and might have even won the NBA finals as Dallas didn't turn out to be that strong.
Brunson gave them good spot from their last campaign I also think that he deserve that treatment, not unless there's something left for Randle in terms of leadership, more on how the coach side whether how they'll going to control the ball if who's going to take charge, hopefully they'll manage to work togehter for the betterment of the team.
We will find it out this upcoming season if how NYK will perform and if they'll be able to move forward and be a good contender of the title, still a long way for them to catch up and established that bond playing together.
Hopefully they can catch and create that good chemistries just like you mentioned Randle after that long vacation might be hungry in playing just need to bind their game together, might be tough if both Randle and Brunson won't surrender that leadership though I guess Brunson can work it out as he already played with young Luka he understand well if how he can continue facilatating the game even Randle is around, hopefully Randle will jive his game and aim for the best outcome for the team and not just to aim for individual stats.