Each headwriter seems to put their own spin on a character, no matter who. And then recasts have theirs. I don't mind the accent, the actor is not British, and is Australian. Gwen has an accent, Tony, has one, John has a different way of speaking, as does Jake.
I seem to remember when EJ Wells first appeared, him sitting in a car with Chelsea I think, and in his own way, had her perform a sexual act for him. It set his character then and there. He could talk a good game, seem charming, but he wasn't.
This actor is not going to emulate James Scott (EJ), just as Cady McClain (Jennifer) did not emulate the sparkle of Melissa Reeves (Jennifer) when she was recast as Jennifer Horton.