"It would add a part of realism for the newer seasons"
Also for many older seasons.
You'll find that in the 1950s and 1960s the race grids usually consisted of considerably less than 22 cars. There were even special cases later, such as Imola in 1982, when there were only 14 race starters, and the ChampCar series of the last several years, as well as many other "lesser" racing series have fewer than 22 starters.
If you do manage to eliminate one team, then it seems likely that you would also be able to eliminate two, three or more teams.
I wish you well in your efforts, as this would be a major improvement in the game, realism-wise.