Yes I watch Once Upon a Time. I wasn't too impressed with him on there but his role was so minor. Him flailing around with his sword was pretty funny. Even good actors seem cheesy due to the nature of that show. He does look hot with a beard.
OUAT IS BY NATURE RIDICULOUSLY CHEESY, and even good actors like Carlyle seem bad.
On the plus side Julian has been praised for his acting in an indie film called Kelly+Victor about erotic asphyxiation. It's not available in US, not sure it ever will be. Sometimes it just takes a better project/script to show talent...
Julian Morris was also in a 2009 horror film called Sorority Row, which has a few vague similarities to Pretty Little Liars. Even though Sorority Row's storyline was predictable, and had some plot holes, it had some good one-liners, and the acting was decent.