Exactly, and these days only the 604 and 605 has AMs, they use VWLs on the 602 now and sometimes the 604 gets them.
So in reality, the vast majority of customers in Waterford are getting worse buses despite them being 11 years newer. I don't dispute the fact that the StreetLites are a big upgrade on the AMs - but they're no VWL.
With these being among the last ever PSO buses to be diesel only (along with the batch of SGs in delivery with DB, plus another 100 or so buses next year) it will be interesting to see what single decks come next. Non diesel only options on the single deck front are very limited to say the least, although they do a hybrid StreetLite now.
I don't have a problem with a uniform PSO livery, I do have a problem with this one, while it looks a lot better in the flesh compared to the photos, it's still a fairly poor effort. The Bus Éireann livery the VWLs and AMs have is far nicer.
Standardising spec to make transfers easier is slightly pie in the sky given that BÉ will be operating all of its current PSO urban services until at least 2024 and we know that Dublin Bus will be retaining all of its routes until then as well. Also by necessity the specs will have to be different between Dublin and the rest of the country as things like bonded glazing are simply not practical in a city the size of Dublin, and obviously they need autofare so around the driver's cab is going to be different too no matter what.
I would think the new livery and interior colour scheme will be rolled out over time, I guess it will be part of the conditions of the direct awards for both BÉ and DB that there will be more integration and TFI branding everywhere.