A belated welcome from me too.
I haven't yet had a concierge onboard, although I've flown with some cabin crew who were switching jobs to be a concierge.
Is the list of routes with a concierge the same as originally advertised?
What will happen on longhaul flights without a concierge (eg absence due to sickness)? It might be an issue for some (probably not for FTers) to have a concierge on some longhaul flights but not others.