Or show some blood mages as we had in Origins, doing that horrible stun-everyone thing (which as I said before, wasn't all that fun after a bit...) Something to show the templars are scared, too. Faces leaps to mind. Show me a scared templar, & I'd change my mind. (I loved Thrask, poor thing) Show a gloating mage controlling someone, & sympathies would shift. (this is why I assumed there was another version)
They probably could take the idea that some mages feel superior, which leads to slavery, a bit farther. I'd happily side against any mage who enslaved others, after all. (I tried to ditch Morrigan when she suggested I abandon the city elves to the tevinter slaver-guy) In a way, rather than just 'they go crazy easily & wound people' angle, I wish they'd shown more genuinely bad mage stuff. Turning into a big swollen thing & promptly dying isn't all that threatening - Fenris's master, however, deserves the spiky hand through the heart treatment.
The templars needed more Thrasks, & even the twitchy Cullen, up front, and the mages needed more jerks. (Grace was a jerk - but her snarkiness couldn't compare to the outright loathing I established for Petrice.)