Ok, let's imagine score formula that gives 900 points to all finishers and remaining 100 points are awarded according to speed. No more gaggles, problems solved?

Wrong. Nothing changes. Same pilots will win and others loose. All we change is point spread between pilots. If winner of the whole competition gets 10000 points and last one 6000, new formula gives 10000 to winner and 9500 to last one. Point spread is very small, but it is as difficult to make any difference by flying as before. Next we start calculating decimals.