Waiting for a review and trying to decide if the reviewer's opinion is in-line with what will make the game enjoyable may or may not be a dumb practice, so I can respect not listening to "gaming journalism". However there is such as thing as making sure there are no pigs being coated in make-up and shipped with your game. Simply put, in my opinion the company has lost my trust and needs to be made up for the significant down-gradation of Dragon Age 2. Whatever you think about the design decisions to make the game more arcadey and twitch-combat-oriented is one of opinion. The decision to rush the game out the door and re-use assets over and over and over alongside a rather linear/bland/predictable story is simply EA/Bioware sapping the development budget because they know the name of said IP will ensure extra sales. It's not like they don't have the talent to make a solid sequel with a gripping story; they simply choose a quick moneygrab with heavy handed PR instead of a quality game.
I understand your trepidation and it makes total sense for someone that feels the way you do to take a wait and see approach. I didn't buy DA2 at release because I hated the direction they were taking the game and was never impressed with anything they showed or said about it. In cases like that, I will look to reviews and others to see what they have to say before I take the plunge.
However, if I've got a good feeling about a game (like DA:I) then that is a feeling that I'm fine with taking a gamble on. If I'm wrong? Then its something to keep in mind the next time Bioware wants to sell me a game.