No offense to OS members, but this isn't the typical response to 'cheeser' complaints. Best advice of the year!
To me, the relationship between cheeser and cheesee is simple - but it's not parasitic. Quite the opposite. It's 100% symbiotic. Follow this logic:
You cannot be cheesed unless you let someone cheese you. If this game were any other sport, take boxing for example, cheese would be essentially pummeling someone who refused to block a left hook with several left hooks. Only in Madden is attacking someone's apparent weakness considered cheese.
To the OP, your son's mix of draws and Hail Mary pass plays is a logical mix if you're only going to use two plays. To defend the Hail Mary, you need to back away from the line of scrimmage. To defend the draw, you'll need to come toward the line of scrimmage. It presents a unique quandary for the defense.
How will you defend the deep ball AND the draw?
Until you answer this question in a way that is consistently effective to beat your son - he will continue to use an unsatisfactory answer to this defensive question against you.
Don't think of it as cheese. There's nothing cheesy on unethical about it. He's doing you a favor by showing you where you are weak and giving you ample opportunity to refine your strategy. Use it as 'tinker time' until you find at least one way to defend both. Then look for a second way, a third, a forth... Keep looking until you can defend him without being locked into having to call two plays the whole game and the game will be fun for you, and you break your son out of the habit of running two plays.
In the end you do one another a service that improves your process for dealing with strategic challenges, you strengthen a lifelong rivalry, and push each other to improve and refine to stay competitive. Symbiosis.
Let me know if I can help you formulate a strategy... Nothing makes me happier than beating the children. Spare the rod works for Madden too.
Later