On the subject of tracks, I'm a bit surprised that there's not at least one flyaway race. Blancpain Endurance has been extremely successful and there's no reason Blancpain Sprint won't be the same. Additionally, they may, at this point, want to spread their name and their company to other regions. In a geopolitical sense, it's not a bad idea. Financially, it would be tough on teams.
I would really like to see a return to Interlagos.