I've listened to enough Jay Inslee interviews to know that he's unlikely to impress. Look at him here, or here, or here.
YMMV, I guess, but he's just not good on television. I don't like judging the candidates this way, but the emphasis on these stupid spectacles forces the conversation.
I mostly agree with your assessment, but most of the other candidates in the orange debate are either fairly well known, or complete jokes, so I think he has a decent chance of being the person that "breaks out" the most