I don't know if they changed "the basics" of Robocop as I have not seen the original. However, I think you should see the movie before criticising details in it. You're assuming that something is not in the movie because a random poster says "it's not in the movie".
I don't think Poni_boy picked up any of the political metaphors in the movie, which were a heavy part of the world-building. The drone (ok, "autonomous robot") invasion of Tehran at the beginning is clearly a metaphor for the rise of drone warfare, how it's changing military warfare, and a projection of what it might lead to in 10 years. That's how the movie starts, by painting a vision of the future motivated by current political themes and hot topics.
The meanings of words evolve. "Drone" now means controlled robot, but as the robots are designed to be more and more independent, the same word will most likely be applied to autonomous robots. The same way we use the word "computer" for completely different objects than what they were 100 years ago... it's because the application is the same.
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You know, in 2001, 15 Saudis hijacked an airplane and blew up three buildings in New York. 2 years later there was a 3 trillion dollar invasion that would eventually cost hundreds of thousands of lives of Iraq to remove a regime which was hostile to Saudi Arabia. If you don't understand politics, that looks like a "plot hole". It's not a plot hole however given that it actually happened.