Nice post overall, most of which I fully agree with. That said, I couldn't disagree more with the bolded part.
Jason's inclusion is important to me because of his interests as he finally enabled Jeff to discuss one of his favorite topics in more depth again, i.e. fighting games. The result of this in a more formal capacity is the Ranking the Fighters series, a series I'd rank (no pun intended) quite high amongst their other content that imo let's them work off of each other well as they dig up obscure and less obscure old fighting games.
That interest alone is enough to justify Jason's presence for me. On top of that I find him to be not dull but instead chill, modest and down to earth; heck his voice alone makes me feel more relaxed as well.
To each their own I guess.