First draft of a script is a rough way to judge. Movies change a lot in the course of filming and editing. I don’t want to toss aside any of the existing Apes movies (well maybe Beneath) but I still want to see a movie actually based on the book. It’s a hell of a story that CAN make a great movie.
I just think Serling’s vision is inferior to the ultimate vision the filmmakers went with. And the reasons are the same defects we see in Twilight Zone - too literal, too obvious, and not much creativity.
For Serling, the apes had to be almost exactly like us. I think that’s a terrible creative choice.
There’s some controversy over the ending and who gets credit. Admittedly, it’s a totally Rod Serling ending, and it’s powerful. But the imagery isn’t even original, having been used in a 50s SF magazine, I think. I don’t think anyone stole it (Serling, Jacobs, or others), but it’s not original, either.