No. I'd argue losing Rozier, Kyrie AND even Morris helped the others. And yes, I know we probably would love to have Morris now that Hayward's likely out for some time, but I feel we got rid of the egos in Kyrie/Rozier, and by losing Morris it allowed Tatum and Brown a lot of opportunities, and they've made the most of it so far.
I think if we have Horford in addition to the team we currently have, we're clear favorites in the East, and maybe a Top-4 team in the entire NBA.
I would have loved to have Morris, but at the same time I don't know if Hayward, Tatum and Brown would have gotten these opportunities if Morris remained on the team. In a way, Rozier also took some minutes away from Jaylen and Smart last season and was mostly a net-negative it seemed. But now, Jaylen is basically a full time starter and Smart is solidly in a 6th-7th man role.