@jon as someone with a manufacturers POV, I think this is very important to understand.
How well the train operates (reliability, cost etc.) depends mostly on the technical basis that the manufacturer has as well as the collaboration with the custumer, to match their specific operational needs.
But with most things that shape the passenger experience, the manufacturer must put in what the customer orders. Sure, you can and should make suggestions (e.g. layouting the seats to match the windows), but if you're in a competitive tender and don't get awarded any points for it, there is only so much you can justify.
