What matters here is to pay attention and track the corners and FKs, if a player, misses 2-3 CKs in a match, switch him for another -during same match, I do it when someone missess twice-, same with FKs, but usually if you found the right man, you score 1/2 or even 2/2.
The game workd in a way in what select a man between your players that perform the best in these jobs, as the idea is that you have to work to find'em, and then "the choosen ones" work fine there for some weeks, or until the internal team contribution roles change, and this can happen when u sign a new player.