Was wondering if the CB1 covers the WR1 or does your best corner cover the best receiver regardless of if they are placed as WR1 or WR2.

If not, it would be nice to allow a feature to have your best corner shadow the opponents best WR like some teams do in the NFL, regardless of where they line up.

Any help appreciated.

If there are no overrides, then yes, the CB1 will cover the WR1 on the outside strong-side route. Once overrides start being used, any player can play anywhere. If it's an important game, it helps to download a few of the opponents previous games, and see where each receiver actually plays in each formation.

You're absolutely right, shadowing would be a great feature. :)