Thats actually a pretty solid point.
Heres the thing, in my opinion, it is inevitable for the game to eventually become more and more like the NFL. It is just that way due to modern technology and the evolution of the game. Just look over the past two seasons, using the quarterback for example. Last season, for accuracy, it was simply THA. Now, there is a Short THA, Medium THA, and Long/Deep(not sure which one it is) THA. It will make a quarterback like Tavarious Jackson or Pat White a less viable quarterback than your Brady, Manning, or even your Hasselback most likely. Sure their speed is great, but for the most part, NFL teams and offenses have thrived off of pocket passers... there have been times where scrambling quarterbacks have been very effective (Cunningham, Moon, McNair, Vick).
Also, from Madden 09 to Madden 10, with the "removal of the rocket catch" the game is definitely more realistic (removal of RC in quotes because officially its too short of a time to really tell if its gone or if a new fancy pants catch will develop). The reason the rocket catch is completely unrealistic is because it involves someone running at maximum velocity and stopping on a time to turn around and catch a high pass, which is completely unrealistic in real life.
So what does this mean? Well, it would definitely mean that the 'high class' players are more on the norm than they once were. It was hard to be good at Madden 09 without the rocket catch. Yes, you could be effective without it, however if you played someone that couldn't do it you most likely whooped up on them. But, to be completely honest, I would say that at MOST, 30% of the people who play Madden play it at the competitive level, such as online leagues, playing at Madden Challenges/major tournaments such as KOTC and Players Bowl, and look online to sites for overall help with their game. Meaning that the other 70% of the gamers just play with their friends casually, or play dynasty modes and are extremely content with that, not trying to FB Dive, Curl Route, WR Screen, and RC their way up and down the field, and playing more Simulation Style (Real Life Style) and that means that EA Sports is doing the right thing by making the game more realistic.
However, after all, it is a video game. Pretty much every video game ever released has always had a some form of a glitch. It could be a glitch where you can walk through a wall of a level if you enter at a certain angle and speed, or it could be in Madden terms where you have something like the rocket catch, or it could be in the form of Flag routes(or corner routes) in Madden 2006 allowing the receiver to get open every play (at least I think it was Madden 2006, could have been 2005).
As much as I ultimately think that year after year it gets more realistic, its a video game, and that means that there is always going to be a way to beat, cheat, or glitch the computer or person your playing. I am strongly convinced that with the deletion of the Rocket Catch, there will be something new that will make the game a video game after all, whether it is a certain route that will provide a better angle, or a quick slant pattern that is hard to stop, and thats just the way it is.