Very true.
One of the biggest things that has me excited for MP in relation to the core gameplay of DA:I is that battling enemies, especially tougher 'boss' opponents, is not about swinging your sword/magic spells at an enemy with inflated health bars until they die, but approaching each fight tactfully and using the other members of your party to your advantage.
Really, I picture MP for DA:I to be 'slow paced' when compared to ME 3's MP; the battles will be less about filling the screen with enemies to kill and more about players facing enemies that require teamwork and tactics to take down.
I have a similar vision. In my mind, they could pull off a RPG "one-shot" adventure in a multiplayer or COOP mode. I also think that the idea of using agents like N7 agents from ME3 or in this case, agents of the inquisition would serve the MP version better. This would be a way to play as the lower level minions of the inquisitor doing the missions etc etc.
In ME3 MP, which I loved, you could play with a group, but it ended up not mattering once your skill level was high. You did not need a mic or anything.
If a more traditional RPG setting where team members need to support each for things like healing or cross class combos....you will want to coordinate. Successful groups would need MICs etc.
It would be a wonderful way to enjoy an aspect of DAI. In my mind, when Bioware talks ambition, that is what comes to my mind for DAI. Of course, I am getting DAI no matter what. I love RPGs, traditionally I am a SP kind of guy, but I have come around to enjoy lots of options. It prolongs the longevity of the game, of the IP and of my patronage.