[@McHaggis] I have to disagree with you considering there are limitations in both games. 
For example, mages are undeniably squishy regardless of how powerful or what abilities. But what skill building is there to do when everyone starts with max specilizations? I'd say two at max, and as for unique characters like golems? 

The tree spirit is technically a Trent even in DA lore. 
As for your cop-out reason, I call BS on the Inquisition not keeping tabs on everyone. It was literally the biggest thing to my understanding on DA:I. 

Secondly, Merril isn't even that strong of a blood mage... Yeah, she is good with status effects. But that was honestly all she did best in my playthroughs. 

But, at the same time, not my call... I just find it a bit much when everyone is absurdly powerful from the start.