I am currently playing with West Ham but it's a generic thing that drives me crazy.
This is my midfield trio:
On corners (and attacking set pieces) I have Soucek the left central midfielder attacking the near post.
If I need to take off any of the other midfielder (usually to bring in Mark Noble) it makes more sense to move Soucek to be the BBM on the right which causes Rice or Noble to be the player who attack the near post and Soucek to be the one who lurk outside the area.
I know I can change the corner settings after the substitution, but it just makes no sense.
Soucek has to be the in the box on croners and it doesnt matter if he's playing MCR, MCL or Poacher.
The set pieces should be set for a player and not a position.