yes, you're right however.
I think they need to somehow change the system so it's harder to miss games but there's still an accumulation punishment. maybe add one extra game?
I'd change it to the same rule as the World cup. Clear all yellows after the Quarters but you are still out if you get 2 yellows across the 2 legs of the semi.
As it stands it is really harsh on someone who might get a yellow in the first leg of the Round of 16 and then pick up their second in the second leg of the semi.
Edit: What red+black said