I think if a few months from now Morris is still receiving heavy minutes, it probably means bad things for one or both of Jaylen Brown and Gordon Hayward.
It might make sense to sell high on Morris right now when you could feasibly get a protected 1st for him. Sure, he's a rental, but because the team acquiring him retains his bird rights, he's gotta be seen as having some value. Ultimately, the hope is that Hayward returns to an all-star level and I assume we'll want Brown to get major minutes off the bench.
If ever there was a time to sell high - it's now. Not a few months from now when Morris' shooting has come back down to Earth and fans are whining about him eating into Brown's minutes.
I don't like the idea of wasting an asset and letting him walk. Realistically, our championship window begins next season when hopefully the Warriors will have broken up the band. I love what Morris is doing right now, but I'm not sure it really matters with the big picture. I'm still of the belief nobody comes close to beating a healthy Warriors team this season. Most stacked team in NBA history.
You could talk me into the idea of keeping Morris long-term... especially if you really think we have a chance at landing Anthony Davis this Summer for a massive package built around players like Smart, Brown and all our draft picks. A massive consolidation trade may put us in a position where Morris as a long-term fit makes sense.
If keeping him is genuinely in our best interest, I wonder how much you'd be willing to pay him if Markieff Morris coming on board for a wink wink vet min/MLE deal was also part of the transaction. Remember, when the Suns extended Markieff and Marcus, they basically signed them to one contract worth 4 years 52 mil (26 mil each). Those crazy twins are so close they actually share a bank account. Logistically, one brother was signed to a significantly larger contract than the other. I think Markieff ended up getting like 8 mil per year while Marcus made 5 mil per year, but none of it mattered since all the money was shared equally between the two...
The point is... since both Morris brothers are unrestricted free agents and inseparable, the Wizards and the Celtics are in unique position to use their bird rights to re-sign their guy to whatever amount they want - and get the other brother on board for cheap.
Example: Boston could be like, "ok, we'll use our bird rights to extend Marcus at 20 mil per season contingent on Markieff signing for the vet min"... it's just the type of whacky cap circumvention Danny Ainge would adore.
Taking that a step further, you have to assume that prospective teams are aware they could utilize one brother to snag both. That might actually positively impact Marcus Morris' trade value even further... since a team like the Rockets could be like, "well if we give up a 1st for Marcus, we will be able to use our bird rights to keep him and get Markieff this Summer as well"... they'd be able to exceed the cap to basically whatever amount they want and the other guy can sign for an exception. I mean, literally they could sign Marcus to a 30 mil max contract and Markieff to a 1 mil vet min contract and both brothers will ultimately end up with 15 mil per year since they are freaky weird twins that share everything.