VCCS works and is working well.
There were more than adequate back-up facilities to it on day one and there still are and always will be. In fact we have better back-up/redundancy at Swanwick than we ever had at West Drayton or even back in the halcyon days of operating in our ivory tower at LHR.
There is always a certain amount of mistrust in new equipment. With VCCS I think the rumour mill allowed what issues there were prior to going live to be somewhat blown out of proportion and it perhaps got a rap that wasn't entirely justified.
Whatever, it's here, it works, it's staying.