Li Shenron
Legend
Another issue, mentioned above, is the page-count required to provide a wide range of possibilities.
I don't think the page count would be different, because they are not going to provide multiple "version" of the orcs, each with its own stats and backstory, otherwise there will still be some of those versions with the same problems. Someone who is offended by PHB orcs will still be offended by the Greyhawk version of orcs which is used to represent the previous PHB default.
Instead the generalization will be accomplished by removing specific bits of stats and lore from the orcs description. Eventually the player or DM can bring those bits back, or add their own, without WotC being culpable of offering a potentially offensive default.
That said, I still don't understand why orcs are being targetted. Drow is certainly understandable, but why orcs and not goblins, hobgoblins, giants, hags...?