Wait, you guys don't adjust the tactics in the tactics window in the character screen? It's not as extensive as DA:Origins, but it's there.
To say that it's not as extensive as DA:Origins is a massive understatement - it is so pared down that fiddling with the very few settings there hardly warrants calling it "adjusting tactics".
I'm VERY early into the game, still getting the hang of it, and thus far I like the story, like the look of the game, but I'm having a hard time getting used to the controls and how combat works. Just saw and fiddled with the "tactics" options as I leveled up, and could hardly believe my eyes. Carefully setting up precise tactics for combat made for an effective squad in both DA:O and DA2, and in both games, I ended up getting mods that expanded the tactics options further.
I remember as this game was being discussed and speculated on during it's development, my wish for it was an expanded tactics screen, that, to avoid making it too confusing for casual players, could be behind an "advanced settings" button on the tactics screen. Boy did I get the exact opposite of my wish. 
I don't know what sort of modding possibilities the game has, or if expanding tactics would be within the power of any modder, but one can only hope. I really don't understand this design decision. As pointed out in earlier posts in this thread, the options given are totally insufficient to avoid squad combat becoming quite tedious, with a need to either micromanage, or live with your squad mates making poor choices.