I'm just gonna say I was kind of disappointed they replaced the EN voice cast at all, cuz 2.0 was pretty bad but the improvements in their performances over 2.x was very enjoyable, and leave it at that before it turns into a conflagration again.
I figured it was Urianger anyway; he's only had like 2 lines of spoken dialogue since the end of 2.x (when he gave you the White Auracite before your trip to Azys Lla), so that they'd use a temp in place of getting him properly recast is far from surprising. Sure hope he doesn't betray us... I've had it up to here with traitors making excuses for their betrayals what with Rachel Claudius in God Eater 2...