I agree that a movie doesn't have to be rated R to be good, but I believe that 'Robocop' should. The movie is from a different time, when movies were full of ultra-violence, drugs and sex. I get that all that 80's stuff was pretty crappy in hind sight, excess was the point of the 80's after all. Still, the same way you can't take Superman and make him dark and gritty, you can't take Robocop and make him crisp and clean. That 80's excess was the point of movies like 'Robocop', seeing terrible things happen helped you digest other terrible things, like turning a human into a walking murder machine. Nothing in that trailer made me think that turning a wounded cop into a semi-human machine was a good idea. Also, by scaling back on the nastiness, you make the greedy corporation cartoon villains even more cartoony, since there's no visceral imagery to go with such super evil. It's like in 'Elysium', the rich people didn't seem so cartoonishly selfish because Kreuger was there being terrible.
Also, how do you screw up the ED 209; the big bad ass from the original movie doesn't look intimidating at all in the trailer.