My honest opinion? It's a really silly idea. Darkspawn is NOT friendly. They are the ENEMY.
The Dragon Age lore maintains a certain level of integrity and this would make a total mockery of it all.
If you want silly lore-breaking stuff, you're in the wrong place.
But what abouth the Architect or at leat the Messenger? :/
Sure the Architect caused a Blight and the Messenger spreads the taint (though unknowingly as far as i can tell), but their intentions were both good. What if the awakened darkspawn that were following the architect just wanted to be accepted, and joining your Inquisition and fighting the Elder One is their chance?4
Of course, i totally agree that we're also gonna meet some mean darkspawns that just wanna stabbity stab, kill kill.