I don't think Romanuk is very good at his job, but he doesn't do more than annoy me a bit. I don't think he's that bad at conveying the feeling of the game either, plenty of his comparables do a worse job there. Listen to the Capitals play-by-play guy, for example. It's like he's having a conversation over the breakfast table no matter what happens, except for his goal calls where he just seems like he's trying to sound cool.
Millen is worse. He's there to provide explanation and in-depth reference on what's going on, and often it feels like he does more harm than good. He tried to push the Matthews angle so hard in the last game that it became nonsensical. Nylander dashing in, creating a chance, hunting down the puck, winning the puck back and forcing a shot on Wellwood out of nothing turned into.... him exuding how Matthews was taking over the game.