1. Agreed because cameramen are never to be seen or heard in any mainstream sort of entertainment, this should be applicable to porn as well - unless the cameraman is part of the theme/subject like POV.
2. This is a tough one because respect of the actress/creator needs to be taken into account. We don't know what her birth control situation is like, we don't know if one or both of them have STDs, we don't know if she has/can/wants to have a hysterectomy or her tubes tied, etc. and therefore, maybe taking in any seminal fluid - both pre-ejaculate and actual semen - might be a bad idea for her. The best I would say in this circumstance is don't watch if it's a turn-off.
3. Yeah, people don't watch porn for the soundtracks, if you know what I mean. It's also not as if the production value of the music is especially high-end anyway. A lot of softcore stuff that you might find on HBO/Cinemax/Showtime in the last 10-15 years tends to recycle the same musical cues so I get you there.
4. I'm with you on this as a matter of taste but that's also a matter of consent. As long as the act is legal, the actors/actresses consented and the proper releases have been signed and disclosures exist, that's mainly all that matters.
5. It's antiquated to censor penetration. Penetration shots in porn are overrated IMO, but to think that a person's too frail or weak-minded to see a vaginal orifice or a penis and to see those two in action together sounds like that country's government is too conservative or backwards-minded.
6. This is endemic in a lot of online sex work you see on Onlyfans - see Amouranth for this one. The content makers tend to get away with it because they're supposed to be in control of what they make, but the platforms that host these sorts of content work against the principle of why they're in the business in the first place and undermines the integrity of their platform as a whole. Someone shouldn't have to screen a clip for being fake before rubbing one out, that should be a TOS-level enforcement for the customer's sake.