While calling plays during the game, I will select the blitz package from the dropdown menu and then select what formation I want like the 4-3 base. Then when I click on view plays for that package and it brings up the 4-3 base normal defense plays and not the blitz plays? Shouldn't I be seeing the blitz plays instead?

That's what I was wondering. It would be great if there were diagrams for the blitz plays.

I believe the way to see the blitz plays and add them to the playbook on your own you would need to go in and edit the Plays xml file to make them appear. I've never done it before but I believe if you do that then you will be able to see the play diagrams.