Oh wait I can just answer these things now lol.
As I commented, the only reason that tours don't take place in tiers other than gen standard is because that's what the tour creator wanted it to be. If you put up a tour idea and said it would take place in NatDex or BH or something then it would.
We're currently taking people's thoughts on tournaments and how we're going to structure them in the future as well as the possibility of making a new tournament ideas page, in which new ideas are more likely to be seen. However in regards to any tours that happen before then, you can raise concerns about their tier, rules, bans etc beforehand and we can have votes on what people want. I'm open to changing tours if the players agree that doing so is beneficial. There might be some requirements like having to have played in a tour in the past, but nothing more severe than that. We'll figure the specifics out later.