Spare us the "action oriented gamers don't like hard games" nonsense, because they actually like HARDER games.
As for the topic, I don't know. There was a time when I would have said, "no way!" but I'm replaying DA:O, a game I had tremendous trouble with when I first began, and had to use killallhostiles on (seriously).
Now, however, I'm playing with the Advanced Tactics mod that allows me to enable tactics for the controlled character (by-the-by, Bioware, you really ought to add this feature), and all of my tactics are the vanilla ones, and I'm playing on Hard, and I don't have to actually fight any of the battles.
Now, someone will usually wipe, usually Alistair, and occasionally two people (Leliana is squishy), but I'm still near the beginning so I'm not particularly powerful yet. It will only get easier.
So I don't know. What I want is for Normal to have enemies with 100% hitpoints that do 100% damage, with full friendly fire. As long as there are REAL tactics options that allow you to make characters avoid AoE (like the combat behaviors in previous games, but with more control), I think this would be fine for Normal.