I don't think it's a problem necessarily.
IT and Kyrie is a wash, although Kyrie could likely shoot more 3's here than he did at Cleveland.
I think JB could definitely provide similar shooting to AB. JB was showing good signs of being a solid spot-up shooter, and he should get plenty of chances as the 5th option.
Hayward is a better shooter than Crowder overall, and I think he's an upgrade.
Morris is the only significant change, being a considerable upgrade over AJ.
Our bench is where it gets a bit tricky. We're replacing known quantities in KO, Jerebko and Green with complete unknowns like Tatum, Yabu, Theis and Semi (obviously not all will get minutes). Tatum is a safe bet to be a solid outside shooter, if not immediately then certainly down the track. Semi and Yabu have all shown decent range and a willingness to shoot at whatever level they've played at, and Theis has always seemed to be a solid option as a stretch big. If they can do it at the NBA level is another question.