Calendar, Tracks & Myteam
From a calendar point of view, the 10,16 or 24 selections are so out of date now and there is no reason for me why this can't become fully adjustable, say from 10 races onwards. Also, you absolutely should now be able to change the calendar order. Anyone who has seen F1 Manager footage knows this is more than possible.
Track wise, I get licensing etc but come on... lets get Istanbul Park, Sepang, Hockenheim, Nurburgring, Paul Richard, Portimao and Mugello in the game as options to add to the calendar. Moving away from old gen consoles I'd love for this to be possible.
I still think it sucks that you can't add your own character to myteam. Even if you end up releasing them and they join other teams it would be a cool feature.
Lastly, pre-season testing would be good, maybe one or two sessions where you follow programmes to unlock R&D dependent on your performance.