^I think you're underestimating the sheer volume of work involved in replacing every CG effects shot in 110 episodes. It's not just spaceships. It's also the PPG bolts, bluescreen backgrounds/set extensions, the occasional creature and...well let's just say "today's technology" and enthusiasm are poor substitutes for a talented crew and a budget.
Oh and then there's the fact that some of the raw footage was eaten by rats...