I've commented before on this also, I like the idea of 5 daily races but honestly I would be more than happy if they just gave us 1extra.
So they could give us 2 C race events.
GR 3 and GR4 one day
GR 1 and GR 3 another day
GR1 and GR4 another day
And back to the start, so this way there is always and alternative for the longer race.
Or,
they could use it to experiment with different options like,
Just ABS races or races with counter steer assistance off,
20-25 lap races, even something like a 45 -55min endurance with at least 2 pitstops (this would open up race strats at bit more.)
10 lap single make or production car races.
A mini championship of 3 different back to back races points given in each race and big prize money at the end of the championship. (Even each race could be a different car class)
Etc etc etc....like many other members good ideas
Then see what interest this generates and use this info to give a better selection for daily races each day and also see how it affects the player base, It could help make it grow!!
Also,
I'm sure there is people that would like more variety in the shorter races but there just not for me, I find the race is over just as it gets going.