Agreeing with Marilyn on this one. Orianthi is more than perfect for the new role as guitarist. She will definitely deliver.
You can follow her on Twitter. She's updating all the time on when she is going to rehearsals and how much fun she has at them. You KNOW her and Michael are going to have some interaction when she solos on specific songs.
Never fear, Orianthi will surely surprise us all on opening night!