I had similar concerns when I looked at Tape's stats. And then I watched his tape. He has a skill set on offense that we do not currently have (I'm reserving judgement on JBA at this time). Tape might not be a difference maker in terms of volume scoring. But he is more than skilled enough to present as a low post scoring threat. This alone will cause defenses to play him differently than they do with our current 5s. For example, Ds would have to double down, or provide weak side help, or deny post entry passes, and would be more reluctant to leave the 5 to provide help defense. Nobody has to play our 5s this way currently.
Having a 5 that demands that kind of reaction from the D would be a difference maker for the other players on the floor - especially given the shooters we have.