Good for 5-car units, bad for two cars.
A 2-coach train with 4 bike spaces, vs the new 5-coach trains with 2 bike spaces? Are GWR▸ just making it up as they go along these days?
I guess the biggest issue is people knowing it is there.
As part of the 5 car (2+3) consist on Cardiff - Portsmouth services, a significant increase in cycle / luggage space will be very welcome for both cruise traffic to / from Southampton, and for peak hour travel with cycles into Bristol. Previously constrained by lack of cycle spaces or the ability to store cycles there, Patchway for Aztec West becomes a marketable ride and cycle opportunity.
As noted, big issue with people knowing its there - especially the occasional users off on their cruise who'll have to get in the 2 car set rather than the joined but not through-ganwayed three car set.
On TransWilts which is set to become 165 for a year or two - not so sure. We certainly managed to get 4 cycles on a 153 quite often ... so I expect we could expand and get 6 cycles in the space on these, and at all the core stations on the Westbury to Swindon run there is a considerable urban area that's logically reached by cycle from the station.
Perhaps we should ask GWR what the intended diagrams for this change are, or whether it's to be applied to all the 165s.