They couldn't afford to do major changes to the ship model back in 1995. If they'd done the show in the 2000s then it'd be easier to change the CGI models they'd be using then. That's how Enterprise got away with it, as well as NuBSG.
Moore is a whiner anyways. He had his own chance to do all that in nuBSG and he still blew it himself with nonsense like how they make booze out of algae and how they never ran out of Nukes or how they could make new Vipers on the ship.
He has no idea what it's like to deal with Network pressure, and when he did have network pressure on him he ran off crying like a baby.
I still absolutely LOVE BSG!!