Extremely important:
1. Saved full race replays (like were in EA Sports F1 games). It's very important in Online championships;
2. TV graphics (especially it is important for streaming races as a spectator);
3. Manual pits and parking to start position at formation lap. Lap from pits to starting place before formation lap;
4. AI making mistakes (spins, crashes...);
Important:
5. Reference as better as possible.
6. More realistic car damage;
7. To be able to ask engineer where you will get out if you will pit at this lap and how busy track you will have;
8. Better menu at practice and qualifying (to be able to check lap times, top speed);
9. Weather from wet to dry changes too quickly; Too many wet races;
10. AI level recommendation after the races in Carrer mode (it's important for new players, then you don't know 50...70...90 to choose);
11. Team pit place moved to other place by klast year result (like in real F1);
12. Update team / driver performance with game updates;
13. To be able to race medium/hard tyres in TT or 5 laps race;
14. Team members on the podium have champage now. Need to be solved;
15. Bottom to save all information about the race into text file after race;
16. Don't change gearbox mode racing at SC time (with AG), leave more space to car ahead;
17. Terminal technical problems (as to AI drivers). With possibility to turn off at menu.