I'm still not sure they actually did spend a great deal of time advertising it in DA2.
Marketing is about appealing to the audience, not what the developer feels. And I'd wager the audience chiefly interested in a tactics system is dwarfed by the audience interested in tactical view, the open world environment, companions, Skyhold, ect.
Sure, the general audience they're aiming for probably doesn't care about tactics. But you would think that in the abundance of videos, interviews, and various gameplay postings that we'd know whether or not tactics are the same. I would be shocked if they feel like tactics are improved and they wouldn't make a single mention of it. Even when they said that healing specializations and skill trees were taken out, which they had to know would be viewed by many as a negative, they still were quick to promote the new heavier focus on other supporting skills. I
And I'm not sure why your assuming that the you would have to. You seem to assume that you'll have to direct every single action taken, which is just bizarre to me.
My issue is that if the combat has as many different playstyle options as the previous DA games, it seems almost impossible to me that Bioware has designed an AI the can predict the desired move even 50% of the time. There's just too many ways to go about combat to design an AI to get it right. If they did, then combat is either so simplified that it isn't worth playing (which I know isn't true from the gameplay videos) or Bioware has designed the greatest AI in RPG history (which I also doubt).