SATC was all about the sex and relationships of city dwellers. Sex and the way people have it and find it and identify has dramatically changed since the last series and there's much more of a language gender, sexuality, etiquette and consent. To not acknowledge this would be pretty dumb and the truth is we are all learning - us and the characters too. Anyhow lgbt has always been a part of SATC, Samantha had a lesbian relationship etc - but the ethnic diversity was way off and needed addressing. They've had to do a lot to modernise it and I think it's improving episode by episode. The story line about Rock just feels like stuff that is happening in schools, kids are much more experimental with their identify these days which is great.
Additionally these ladies have children and other baggage now, it was always been about relationships, and to focus just on the relationships between the ladies and whoever they are shagging isn't really representative of their age group and would feel pretty shallow. I like the new depth, when I was watching the first time I was a teenager and now I'm a mother, so it works for me.
In terms of depressing stuff, it always covered hard topics like Sam's cancer battle, Carrie's break ups, STDs, menopause, divorce etc
Honestly I don't really see the issue with Miranda having some fun with Che. She's clearly miserable in her marriage and has never been that into Steve. Carrie's reaction was ridic, surely you'd just shout and said 'help I need to pee'? Or 'I can see you guys!'. Not lay back and watch them whilst pissing into a very small bottle, weird. Friends are supposed to be on their friends side, and her reaction was prudish / judgey after all the stuff they've been through as friends. In terms of sex, I thought it was hot and really well done... a woman having a sexual realisation at a time when a lot is changing for her. It's a confusing time in a woman's life and stranger things have happened in real life, obv there is chemistry with Che. I feel Miranda is a logical person, she will prob give up the booze easily as it's logical but as she said she doesn't want to give up on discovering her sexuality. She's seeking something else clearly.