I saw them twice this tour, and I think both of them are great musicians! Being a musician myself, I really appreacited the work both of them did. I don't want to speculate , but like many other REAL BANDS (I'm talking U2 level, not britney spears) BJ probably uses background tracks and samples. Maybe these two musicians are simplifying the process of having to sample other guitar, effects, etc...
Regarding the fact that they look bored, i think bjcrazycpa makes a point here, they are left in the shadows, although both shows I saw Bobby Bandiera interacting with the stage crowd.