I do know they have not promised jack about our decisions meaning anything in MEA, while they promised we would shape the original series with our decisions. That speaks volumes. They have not repeated the old failed promises for this game which means your decisions are not worth anything. You are boring in your lack of comprehension.
We don't even know if it will be a trilogy. As a developer and from what I've heard, I know that they learned from the previous games. Mistakes happens (I've never seen a 100% success project, something always go wrong, from the lore to gameplay) and BioWare is full of good people, gamers at first. In our industry, expectations are pretty high and you're always trying to do your best, challenge yourself (and surely when you're developing a game for 4-6 years, with a lot of employees) so, while I was disappointed by ME's ending, I know MEA can and will most likely be a great game. Game development is far from being a fun process, that's something most customers don't even realize. So be a little more respectful and let them do their game based on their "vision". It's a creative process after all and if you don't like it, that's fine. Don't buy it.
Will they make mistakes ? Probably, just like everyone else (Naughty Dog games aren't perfect either, key people've left the studio too). Will our choices matter ? We don't know yet, as we don't know if it will be a series. Plus, all they've talk about are the feelings : "exploration" etc. And that is a pretty good hint : they've become very cautious about the "choices debate".
So stop believing you're a knight on his white horse, as you're merely speculating (should I say whining ?) and, as I said, you don't know anything about game development.