See what i am talking about? That is why guns should not be in Dragon Age, gun powder will messed up everything and everything will fall. The very premise of this game fall, nullified by it.
Is there a reason for magic then? mages themselves will forget about magic and use guns with awesome effect maybe better than Tempest Archers. Ander prove that bomb created by sella petrae and drake poop can do awesome effect, why need magic?
Templar will also forget to drink lyrium because this gun powder stuff will do the job to kill Mages
What the hell, everyone will throw everything they curently use and start making awesome bombs.
None of this makes any sense.
Templars use lyrium to fuel their abilities, but those abilities have to be called on. A templar doesn't have a null field around them all the time.
Second, who gives a crap about the bow and arrow tempest thing? There is no evidence that the Qunari have anything like what you're talking about.
If they did, why the hell are the Antaam so fixated on their swords? The military arm of the Qun wouldn't need swords according to you if the had guns.
Did you pay attention in DA2. It wasn't wanted for weapons but for blasting powder to replace lyrium explosives which are unstable.
Explosives are used for a number of things other than weapons.