Its a standard ZF transaxle, pretty much bought off the shelf. The same basic unit as fitted to similar horsepower Deutz and McCormick/Landini, and that includes the hydraulics. Controls and software may well be different.
The Vario will be as fitted to Deutz and John Deere models. There may be options that ZF provide but they will be basically very nearly the same.
Point I'm trying to make is that it is being less than generous to criticise Kubota in this respect unless you mention the others that share a similar spec and near identical components as well.
Thus given the gearbox is fitted to other models, the main reason anyone would buy one of these new kubotas is this 6.6l engine, and hoping they implement Japanese reliability on everything else. ?