That just won't work sir, and for a number of reasons.
First of all it would be unfair to those drivers with busy schedules who might not be able to make time for every race.
		
		
	 
Okay I will be a dumbass and bite because I know this subject can be another one that has the potential to get interesting and maybe not in a good way.
First question is how legitimate do the top drivers who are serious about this competition want to be in the accuracy of the driver that is crowned champion or even that the drivers who qualify  as they advance through the rounds for the actual finals are actually the best drivers that actually deserve a spot on that finals stage?
If it is not that important do not read any further it will be useless to do so.
First there are multiple options that could be implemented to help with the schedule for the racers, use one of the ideas, use them all or come up with better ones,
Increase the number of Nations race slots to 5 starting at 10am, 1pm, 4pm, 7pm 10pm with the alternate Manufacturer series running 70 minutes later in the slot as currently done. This would open up a lot of hours and alternate time slots with 3 hour lead times between the options available that honestly many have already been begging PD for making scheduling much easier for many racers.
Increase the dates the competition is active and adjust to fewer race days each calendar week if needed and alter the days the races take place on different weeks.
It is more up to the competitor to adjust to the schedule of the competition than it is for the competition to adjust for each individual competitor.
A racer that takes this competition seriously enough will adapt their schedule to the race schedule and for many the increase in the available time slots over a wider range of hours will even be easier than what they are adapting to currently.
	
		
	
	
		
		
			Second is the fact that there are way too many uncontrollable variables in this series that can punish or reward drivers who don't deserve it. (I. E. Disconnects, dirty driving, and of course penalties. )
		
		
	 
This is supposed to be E-SPORT racing and real world racing is also is full of uncontrolled variables, weather, Cars that cut off or will not start on the race grid prior to the race start, cut tires, blown transmissions, involved in a competitors wreck which was unavoidable, spinning out and ending up in the kitty litter and yes even taken out by another racers questionable move which may damage your vehicle to a point your race is done, Course cutting penalties also are part of the real world racing as well. Saw several penalties doled out for that in the IMSA race at the Glen last weekend.
Last weekend I was watching several different competitions and a couple of times I got to laughing because some of the on track driving and incidents was reminding me of what you see in gts dailies!
One of the races was between a couple of BMW's and a couple of Benzes from over the big water in Europe or somewhere and the other race was the IMSA 6 hours of the Glen.
So this is supposed to be an e-sport competition are the competitors supposed to be shielded from the variables or like the real world deal with them as they come up. Sometimes Lady luck sucks and sometimes she may hand you a gift, just a part of the racing game whether real world or yes even virtual.
	
		
	
	
		
		
			And lastly, it's just too darn stressful to worry about every single result lol
		
		
	 
Again is this a legitimate actual racing competition where the best racers skills are supposed to shine and their adaptability could be a deciding factor in the races finish?
And just as in the real world an unlucky race or bad finish can affect your chances of being the series champion? 
Or is this supposed to be something that awards participation trophies and is not really a competition at all because the racers results are very likely to be from different circuits and maybe with different cars and you get to pick only your best tracks to count and not care as long as half the tracks you like okay?
So now we have 1 racer that has top finishes on track A and C. Tracks B and D he does not count because he did not do so good or did not race.
Racer 2 has top finishes on track B and D. Tracks A and C he does not count because he did not do so good or did not race.
Out of these two racers one will advance to the next round or maybe qualify for the Star race which awards the extra bonus points and the other will not.
How can you legitimately declare one racer as the winner or to be better or even ahead of the other racer when the results are not even from the same circuits and may not even be comparing results using the same vehicles?
The only way that you have a true winner or even have drivers actually be judged by their on track performance to determine the legitimate racer to advance is to have such racers results come from the exact same competitions. Any other way you have no direct reference that one driver has outperformed another driver if the circumstances and even the tracks raced that yielded the results used to compare are different.
Will you please explain how that can be classed as a legitimate competition with a legitimate winner that one person is declared a champion over another when the results are calculated from differently sourced with no common shared data or results to compare?
If I win a race at Road Atlanta driving a GR4 Corvette and You win a a race at Watkins Glenn driving a GR3 Porsche how do we determine a winner between the the two of us or which one of us is better using those results?