Do you really think they had time to fully restructure and rebuild the commentary in a few months time on top of all the other stuff they have done for Madden 12? There is a TON of new stuff in Madden 12 compared to 11. I'm really getting sick of all the people who can't appreciate what EA is finally trying to do. They have a development team that actually is trying to make the sim/hardcore football fans happy now and not just give us gimmick features that we don't really care about.
The game has a lot to be fixed and it's going to take a ton of work for the developers to fix it, which is why they have now doubled their team, you can't expect it to all be fixed in one year. Since you mentioned NBA 2k11 which is undoubtedly a great game, but how long did it take them to get 2k11 where it was last year? The majority of the game from 2k11 has elements of 2k10,2k9, and even 2k8 in it for that matter. It wasn't like 2k10 sucked or something and all of a sudden they just made 2k11 a masterpiece. They build off of each year and with 2k11, built off of the good elements of 2k10 and made it better.
Madden 12 is trying to do the same thing, but Madden 11 was pretty bad so like I said it's going to take some time. Madden 12's going to be a great game and they made improvements to the commentary, just aren't rebuilding it and competely improving it until next year. Which as long as Madden 12 plays a good game of football and feels/looks like what we see on Sunday I don't see why waiting a year for great commentary is such a big deal.