I like Brown a lot, he's even my keeper on my fantasy squad, but he's in the unenviable position of having done just enough to price himself off the Celtics roster without showing any signs of breaking his, "Jeff Green ceiling".
To complicate matters the Celtics have handled his development super strangely. Since using the #3 overall pick on him they have done nothing but bring in vets and draft-picks who play his position. They've forced him to play a ton of shooting guard despite the fact that his biggest weaknesses are his handle, court vision, and passing, and they've had him play almost no small-ball power-forward whatsoever even though that was his college position. On top of all that they decided after his breakout playoff performance to bench him in favor of Marcus Smart (who reached his NBA ceiling the year he was drafted) and Gordon Hayward who spent all of last season telling anyone who would listen he still wasn't physically or mentally ready to play.
When considering the team's complete lack of commitment to Brown in the past can anyone really see them ponying up the 30 million plus per year it's going to take to retain him after this season? I certainly can't, but I'm unbiased. The most likely scenario is them making him a low-ball offer so they can pretend to be flabbergasted when another team offers him max money- and they subsequently have to walk away.
Jaylen did not lose minutes to Hayward. They both started at the start of the season together and then within a few games went to the bench together. Jaylen played alongside Hayward more total minutes this last year than with any other teammate. Over 55% of his minutes were with Hayward. By definition, he could not be 'losing minutes' to a guy he was playing on the floor with.
Jaylen AND Hayward both lost minutes to Morris. Morris consumed over 2000 minutes this last year -- despite sucking awful from early January through the end of the regular season (to his credit, he played better during the playoffs). Going into the season I don't believe anyone projected Morris to get that many minutes on that roster. But his super-smoking-hot (and totally unsustainable) shooting at the start of the season (combined with Hayward still rehabbing and Jaylen playing with an injured hand and falling on his lower back) got him (and Smart) into the starting lineup and from that point Brad did his usual thing of sticking with his starters no matter what.
Smart, if not having slid into the starting lineup, likely would have still logged close to 30 mpg off the bench so I don't really see him as someone who took minutes from those guys.
If Morris had logged somewhere closer to the amount he'd logged the prior year, that would have meant somewhere around ~600 minutes more over the season for Hayward and Brown, pushing both of them well over 2000 minutes.