Well...I can't really say anything about that league since I wasn't in it. Basically, you can take a chance and sign up or not and don't. Nothing gained, nothing lost.
As for the league, rules/guidelines is by what's in the NFL. We don't really have any issue with guys running hurry-up. Peyton Manning and Tom Brady (currently more Tom Brady) run the hurry-up from the start of the game. They do that to keep defense in their "base" package and prevent substitution. Key games were the Patriots against the Jets. Brady ran the hurry-up from their 2x2 personnel to keep the Jets stuck in their nickel package. Also, see the article about running the hurry-up at: http://smartfootball.com/offense/the...empo-no-huddle.
Or, take the 49ers against the Saints. Big question for the 49ers defense was will they stay in nickel or dime against the Saints' Posse package with Darren Sproles and Jimmy Graham on the field. I'm assuming if you're going to talk about other players not being coaches, you already know about the posse package.
Convention says use nickel defense, but depends on how you view Graham, is he a TE or WR? If you treat him as a TE, then you go nickel. If you view him as a WR, then you go dime. The 49ers did some unconventional things on defense, but not in the way you'd think. Same goes for the league some guys do unconventional things, but it's based on what works the NFL. Now if you use goalline from your own 20 and kept running it until the endzone, then yeah that will be an issue. You could do it in Madden, but no one runs it in the NFL.
I think you need to remember not all leagues are the same. While we aren't coaches, we follow coaches and players. While it is true the Madden engine isn't like real football, you can still be a student of the game to appreciate Madden. And speaking of being a student of the game, have you heard of guys like Greg Cosell, Doug Farrar, Rob Rang, Matt Bowen, or Chris Brown (and no, not Chris Brown the singer)?