Tolkien idea is that they could be redeemable, that could just means, they could be saved, in some way, like turning then back into what they once where(humans/beasts/elves), or similar,nNot that the orcs would be morally grey, which, could probably work as part of the grand plan of they eventually redeeming themselves or with help.
But that require actually work, effort and talented people, and probably a spin-off on its on cause its one hell of a work to pull off
- - - Updated - - -
apparently Simon Tolkien is the one to blame, why he wants to fuck up his grandfather legacy? dunno.