It's not Bioware's/EA's fault for "dumbing" down the game. It is the gamers' fault, or more accurately, the casual gamers' fault aka the "New Age" of gamers, who have a family and a full time job and just want to come back and mash some buttons.
You can also call them the "Instant Gratification" gamers. They expect everything to be easy and within reach. If they play a game and die, they will probably continue and try a few more times. Beyond that, they will shelve the game and deem it too hardcore. Any game that requires some form of skill/strategy or brain usage is too difficult for them.
At least that's the impression I get from my friends. They say they just want to relax with a game. So they buy a game, try it out for 2-3 hours. If it's too difficult, the game gets shelved. They feel bad spending alot of time on videogames so they do other things like surfing porn or sleep.
Case in point -> Anyone who plays tekken in-depth will know that the game is really deep. You need to learn frames, juggles, bounce, just frames..so many things to learn. My "instant gratification" friend just uses Law or Hwaorang and mashes the kick buttons and he says he doesnt need to learn juggles to win. 5 years ago he told me that he's going to quit gaming to find a girlfriend.
Until now he's still a virgin.
And it is precisely because of these type of gamers that alot of game developers dumb down the games to cater to this "Instant Gratification" gamers, not just DA2 that's being dumbed down.