If you're a fan of the band just go to the show if possible. There are band members giving it there all up there, and there is one that isn't. Not trying to diss Richie, I miss him to death, but personal opinions aside we have no clue why he's not there. Just speculation that does not look too promising. Don't short change yourself, or the other band members if you really want to go. If that's the case then I don't see how you're really a fan of the band, rather then just Richie. Regardless of why he isn't there, all bands face issues. Don't abandon them because of it. If it all works out in the end it just adds to the story of the band. Tons of people are going and managing to have a good time. I'm sure you can too. Have some fun and go jam out. No shame in it.