The Dolphins are a madden players wet dream. Problem is, in reality their Oline is average and defenses that aren't afraid to challenge the receivers at the line really disrupt Tua's timing on his throws. Those same speedy receivers don't have the size to climb the ladder on 50/50 balls.
I'd say it's like a geek built that team, but then I look at their coach and it all makes perfect sense. Which is why they'll continue to struggle and lose games against opponents strong on both trenches and not scared in the secondary.