The original RobertCop was iconic. To make minor changes to the look would have been one thing to accept, but to change the whole appearance is to create something that is not ROBO, but a hi-tech man in armour.
Also, I agree with Mr CAT - one of the greatest ideas in all of the Verhoeven movies back then was the OTT and heavy satire/irony approach to the setting and the characters. None of that will be brought to the new film. Surely it will be cut a lot of violence to market the film for kiddies, so we will be left with a film with nothing special in it. (IMO)