I disagree. To me, Deckard was a worn-out, disillusioned human who found himself in watching the struggles of the replicants he was pursuing. Scott released a great film to theaters, then muddled it up over the years by insisting Deckard was a replicant himself, and made it more inaccessible to new fans by removing the voiceover which explained the backstory to new fans. To me it smacks of Lucas-level revision; the story worked just fine without the cliched "twist" he felt he needed to graft on.
Personally, while I admire nearly everything Ridley Scott does (he remains my favorite *director*) I am extremely nervous about where he will take this storyline.