It matters quite a bit actually. What sort of story does a billlionaire need to concoct to a tech nerd to explain how he needs his armored suit, which happens to have a large bat logo emblazoned on the chest, modified for "cave diving"? These are the kinds of questions people ask themselves when they see changes like this. They ask "wait, how'd he get that?"
He put the bat logo on himself, not Lucius. Obviously you don't like Nolan's treatment of how he aquired the suit and equipment but that is just the way it is, like or not.
Bruce doesn't have a cave full of techno geeks that know his secret and make him suits.
No, but he has the financial resources to create buffers between him and his crimefighting persona to get the equipment and modifications that he wants.
This is actually part of my gripe about the Tumbler. How many people would have had to work on a project like that? And once the thing is all over TV in a car chase, the beans will get spilled pretty damn quick. Yeah yeah it's a moive...