Hello again Stefan_Spinnler!
1. I hear you on the scheduling- if you schedule, your email should be sent when the post happens. You aren't the first to raise this bug and our team is investigating a solution.
2. Great callout on collapsible sections. Expanding is something we aren't able to offer at this time, but the section headers should be rendering. I'll file a bug 🙂
3. Good point on BCC- we didn't prioritize adding it as it wasn't part of our previous send experience and we didn't hear of anyone wanting it, but considering we are seeing far more usage and reach then before, I agree with you that it should be added to this experience. You're not the first to point out this problem.
(I'm just going to reply to your subsequent comments here as well 🙂 )
4. This is absolutely a bug- all News made from Made for email News should also inherit the Made for Email properties. This might have been fixed since you commented, but I'll check and log it if it hasn't been.
5. Thanks for the Multilingual callout- i suspect this is because some of our logic for the editor is based on your user preferred language rather than the site language. I agree with you that this is a low priority bug, but its good to keep in the back of my mind for future Multilingual improvements.