he is playing keys because Benny is playing bass.

and they cant add Rogone, that would be too many Lasers, and leave Steve out of the mix.

just my guess but i dont think they will add a permanent bass player for a while.  i think it will be a rotating thing show to show, week to week, or tour to tour.  sometimes the 4 piece.  thats my guess.

but i could sure get used to "Libra" from Floating Action on bass.  that is def him