JO has already shown that he can contribute. What has held him back has been hopes that he could get healthier. We have held him out of games he could have played in for long term considerations. Without the hope of him being healthy, we will start playing him more since it is what it is.
The truth is, if he is behind KG, Shaq, Perk, and Baby at the 4/5, we won't have minutes for him every game anyway.
Based on his health, we probably want him to retire after this season. But he can still contribute.
Don't forget that nothing has changed from a the last few games he played except a rehab plan, and he had some good defensive contributions.
We definitely overpaid for him, but I don't think we also got Shaq for close to nothing.