Re the finishes on their site, I get the impression that BDC are punching considerably above their weight and as has been previously suggested they don't have the ability to manufacture and assemble dozens of kits in identical configurations for their colour chart. That being said, providing a gallery of customer orders, even if it's just one drum could be something they could consider. However I've been on other manufacturers sites where they have a template of a tom tom and you flick through the colours which surely must be the same as, or very close to, a full render.
Re the Premier thing, I never considered Keith Keogh's kits to be "true Premier" kits. They were lovely and excellently made but to me Premier was never about eye watering prices and bespoke wood finishes, they were more about well made, hand built, reasonably priced, factory assembled drums. The industry has moved on and the days of woodworkers and craftsmen in brown duster coats on a shop floor making all ranges of kits almost next to each other are gone. BDC is probably as close to old Premier as possible and their current kits are certainly more like Premier kits than Keith's Premier kits were, but times have changed and the things that made Premier so good ultimately led to their downfall so shouldn't be replicated.