When Pacers were first introduced I supported the idea as a way of minimising cost on the smaller branch lines as a way of allowing the re-introduction or expansion of services within local communities.
I never supported their use on metropolitan commuter services or trunk routes between larger cities.
The aim should be the same for the Class 230. They shouldn't be seen entering Manchester Piccadilly or Leeds. There are better suited, modern, faster DMU or EMU stock for this purpose. It is the opening or restoration of branch line services for which they are most suited so long as they can be delivered at a low cost of ownership and economic operating costs.
The Marston Vale is a perfect example. Improved reliability with the addition of a 3rd unit, and potential for improved frequency in the future. Middlesborough to Whitby would be another, but only if the operation of a Class 230 offers lower costs than a Sprinter unit.
There are many branch lines which would benefit from this development, so long as the units can be delivered as a low cost alternative to existing and new diesel units.
And herein lies the problem. As has been shown time and again the Northern franchise has utilised its units pretty much right across the network, regardless of the stock being suitable. The 230s were predominately designed as Pacer replacements, but the Pacers were already unsuitable for many routes they were being worked on so it wasn't a simple replacement that was needed, it was an upgrade. And the 230s simply aren't that, no matter how they are dressed up, and lets face it they are not that dressed up.
Had Arriva bought into the project not only would they have faced severe criticism from the public but have been left with a series of units unsuitable once again for most of their network, solving absolutely nothing and creating more problems especially given that VivaRail are still to deliver even a single revenue earning unit still.
In his video Geoff Marshall unwittingly highlighted the problem I see with the support for this project here. Towards the end he approaches a carriage, strokes it an declares he misses the D-Stock. For me this project feels more like a restoration project, to keep alive the units that we are constantly reminded have bodywork in reasonably good condition and the popular longitudinal seating layout. They may be suitable for a small number of short branches, but they certainly aren't the answer to the DMU issue and as a battery powered concept they have't even been proven yet.