Yeah, he was using discharge as a pretty good space control tool.
I get why a pro player could really dig Raiden. Solid damage, great corner carry, able to easily hit confirm into being safe with DF2 or going for damage, having a great reversal tool with discharge, and Fox also did a good job of using Jump Superman to escape the corner.
On the other hand, Daph was just talking in his video the other day that while he thinks Raijin is really good, he hasn't had much success with him in tournament yet, so who knows how the character holds up in an actual tournament setting.