Is it me, or is something "missing"....

Exactly. Not a real or accurate representation of the people of the UK.

Nah, I think a show can show minorities in a way that comes across less as a box-ticking exercise. The writers treat it a bit like Noah's ark or Pokémon: got to catch them all. It's not common for a community to be so incredibly diverse since groups with a lot in common (such as minorities) tend to cluster together (without any discriminatory intention). You do have very diverse groups in real life but they usually have something else that binds them together (like my little pony).

On the other hand you have to consider what this show wants to do: provide sex education in a fun form, so from that angle you can see how it's important for the makers to include every minority so everyone feels normalised and problems from every group are addressed and non-minority people (as far as they exist) learn to relate to different minority groups.

Interesting theory. I'd be surprised if anyone watched a spin off of this show, but stranger things have happened.

Yeah I also didn't like the season. I think it was the new school, which seemed so boring, without any edge. It's the most tolerant liberal utopia of a school ever and we are supposed to believe they are not gonna get the lift fixed so the wheelchair person can go to his classes and move his classes downstairs until it's fixed? It's not believable that this would be anything but a passing concern so why would you as a viewer care?

The new characters didn't really grab me and seemed to have been added to the story on the basis of some 'gotta catch them all' logic as I already mentioned above. I wonder if that's because I'm a white heterosexual male and I can relate less and might have some subconscious remnants of discrimination in me, or if any people that are non-binary, trans etc. themselves feel the same way.

Adam, one of my favourite characters, still had his own story but standalone unconnected to the rest of the cast so it felt disjointed. Maeve I never really liked but she's a main characters and sticking her somewhere abroad having her own stories, also unconnected to the rest of the cast is also wrong. They should have either kept them in or written them out.

And the sex-counsellor-battle, completely pointless and so forced... Why could there have to be only one? Why would whoever loses not just continue to provide sex advice to their friends? The stakes are literally 0. I cannot imagine anyone watching and caring about that.