When people are motioning, why would you consider that drawing a play in the dirt? I know what play I'm going to run and the adjustments before I even call the play. That's what practice mode is for. The Madden playbooks are small compared to NFL playbooks, so I consider the plays I make at the line as part of my playbook.
Using the Colts as an example isn't the greatest considering they don't use much motion. When they do, its usually a WR that motions closer to the line. They don't motion across the line or back and forth from what I see, though other teams do. Its basic strategy. Smarfootball.com has a few articles that talks about that and using other motions to force the D to show their look. Other teams use alot of formation shifts, which are not on Madden anymore, so the only option is to use motion. I have no problem with people motioning on Madden because its the only way to get different sets and looks for plays.