Channel Order - we do not have the ability to change ordering today, but a fully-customizable navigation menu is on our roadmap! Although it is not as aesthetically pleasing, I have seen some communities name their channels/feeds prefixed with a number (e.g. 01-getting-started) in order to enforce ordering for everyone.
2.
Feed SEO - yes, in the Feed settings in Slack app home you can disable SEO for each individual feed (see attached screenshots).
3.
Design Team access - we are working right now on granular permissioning access in the Studio! Could you tell me which pages & settings precisely you'd want your design team to have access to?
Awesome, yeah it was the Slack bug after all! It caused that pesky Next button to get cut off.
We'll reach out to you for steps on how to import historical data.