Well, I think we're overreacting a little. Perk should be back soon, and KG should be back very soon. Once they are back, we have Perk/Shaq and KG/BBD. If they can stay healthy for a while, that's plenty. And if JO can even be back by the playoffs, we should be in good shape.
Still, I wouldn't mind Sheed. He'd be nice insurance.
I agree with the first paragraph. Even without JO we are pretty stacked if the rest of them stay healthy.
I think it is wishful thinking to expect Shaq or BBD to perform like they did to start the season. Fortunately, just having Shaq suited up gives us an advantage, as his presence means something to other teams.
BBD on the other hand can be very detrimental to the success of the team when he is off. Regardless, he has looked awful as of late and will have to prove he can refocus to his role of coming off the bench.
Having a 5th big is a huge plus, so if JO is officially out for the playoffs, I'd tell Rasheed to get on a stationary bike and start putting up shots.