I think in this case, it's more just that modern Premier drums are just not backed up by support. As you know I have nothing against drums made in Asia, as when they're done right (current AQX/AQ1/AQ2, pretty much anything Yamaha make, pretty much anything Tama make, the vast majority of Pearl products) they're really good. There's no real reason that a Premier shell made in Asia today couldn't be as good as, if not better than a Premier made in England in the late 90's/early 2000's.
As someone who worked in production line manufacturing in the UK in the late 90's/early 2000's let me tell you, there's more bad than good hiding in there - engineering as an industry in the UK was in decline during that period. Workforces everywhere jaded and suffering from one downsize after another, no investment in machinery... It was a period post 60's-80's where the UK made some great stuff and a period moving towards when Asian factories (led by the Japanese originally) were investing in ways the UK couldn't compete with. Engineering in the UK now has somewhat of a renaissance, but in highly specialised areas such as motorsport and aerospace etc.
So while UK made Genista and Signia were a high point of Premier drums, I refuse to believe that behind those doors, the factory wasn't living the same story of decline in UK manufacturing. Along with that would have come plenty of 'Friday special' drum kits and slipping quality control I'm quite sure. The company, and employees, absolutely would have still cared and been very proud of their products though...
Maybe that's the difference? A modern, ruthlessly efficient factory producing stuff in Asia could totally produce something better than the original Genistas, but they don't. Maybe that's because the pride in the name isn't the same, the pride in customer care/ownership isn't the same. And maybe the parts are built to cost in a way the originals weren't. In itself that's probably one of the reasons the UK manufacturing stopped.
Until current era Asian made Premiers are being made with quality first, not cost, and until they back up their product with service, they're not going to cut it. And when they do, is an Asian made Genista going to cost the same as a Yamaha Recording Custom? Even when it all comes together, they've then got 20+ yrs of bad taste left to wash away.