Back in the 80/90's , The ministry of information used to regulate the media censorship through a censorship board. It used to be a disaster. Even many locals hated it. The situation have improved gradually with the abolishing of the ministry a decade ago.The censorship is regulated now by Qatar Cinema and Film Distribution Company. Many Controversial films that was banned in many ME countries like "The Passion of the Christ", Syriana or the kingdom, In addition to Holocaust themed films have been shown here. I think censorship nowadays in Doha is limited to sexual content of films.
You made some interesting points in your movie-observations.
But do you think locals will actually raise such issue?
Many locals i know are Huge movie buffs, yet schizophrenically will rarely ever talk-movies. You have to know, that there are certain percentage of us, who think Cinemas should be banned altogether

Since Censorship is already enforced, why not do it in a systematic way instead of randomly.(e.g.: FCC Censorship regulation on US TV/Radio)

A relaxed Censorship can be applied shall there was a proper Rating system.

p.s: Many of the questions you raised can better be answer by locals or foreigners who are actually involved with DTFF. I'm sure many already Lurks QL ;)