There won't be many who have read the original 2015 bid documents from Arriva, Abellio and Govia, but the thing that stood out about Arriva's was that it actual had a human touch and sounded like it really wanted to sort out the franchise.
It was affectionate, almost concerned, about the loss of guard grade and was real about the low morale and high turnover at Serco-Abellio. They knew customers expected more and in my opinion were right to be chosen as the franchise operator, based on the offering.
Their words on paper haven't held well after 4 years, but believe me, the Abellio bid was absolutely abhorrent to read about the proposed loss of guard grade. At least ARN started out with the right mindset.
It seems to me that one of the biggest issues affecting the franchise right now is a huge training backlog - whether that be for the new CAFs (and upcoming 769s) or route learning for trainee traincrew. This must be the biggest issue affecting staff availability, and hence cancelled train services (and the cycle of staff shortages leading to late or curtailed services). Quite how changing the operator from ARN to DfT could mitigate this is a fantasy story.
Although branded incompetent, the Arriva parent group must bring experience in dealing with huge amounts of training, including recent experience from the 710 training on GOBLIN. Experience not possessed by the DfT, TfN, Arup, or whoever else would become involved in nationalisation. And before the suggestion that LNER completed their 800 training seamlessly arises, it was at the expense of cancelling passenger train services. TPE too.
Admittedly their stock maintenance seems poor, especially at Allerton, with 319 and 195 failures common. Perhaps any LNWR users can comment on 319 failures on their services for comparison?