Crewbus I dont know of anyone who is pleased at the concept... so far from my experiences it presents the biggest issue on turnaround - CS and L2 boarding, R2 at the overwing (during refuelling) only leaves R1 spare - the CS and R1 tend to swap boarding back and forth quite a bit as CS does a fair bit of work during boarding (OBT log on, flight report, bank bag etc - especially on a short sectors day) - so if you have a boarding issue at the front (eg duplicate boarding pass etc) and R1 goes to deal with that, and all of a sudden L2 has a boarding issue too - well the sh*t can potentially hit the fan - same goes for R2 collecting unmins etc.
I can see a lot of delays occuring because of this... not to mention supp payment forms for crews not getting their breaks (even less frequently than happens now)
Any other thoughts?