Different simulations for each race
Why not pick a specific part of each track round the world to create a simulation to gain or lose time rather than the same simulation each race. For example, the double hairpin in Monaco, the famous continuous bends at silverstone etc. You've done it for the race of the Americas with the ess bends so seems like you can do it for other races.
Seems also like even if you get a great start you always slip down the pecking order...perhaps make the start similar to the getting through the back markers mini game for the first lap?
Ya Boi commented
They need to update the schedule