New timetable : FGW warn of overcrowding

The new First Great Western timetable is due to start next weekend and already FGW staff at Bristol Temple Meads are handing out leaflets stateing that local services between Bristol, Keynsham, Oldfield Park and Bath are "expected to be extremely busy"(i.e grossly overcrowded) and advising Bath passengers to "consider catching alternative services", i,e the Paddington services which "will have additional capacity". Why, if they know the local services will be "extremely busy", do they not add the "additional capacity" to the local services that need it rather than the Paddington services which do not call at the local stations?

See the full leaflet here