I think it is inaccurate to say Jefferies came up with his smooth sensibilities for any functional reason related to the limitations of 1960s TVs or his time and material budgets. He argued for smoothness as a means to play lights of varying colors and intensities off the hull. Roddenberry kept asking for more detail, and Jefferies argued against it for these reasons. He rationalized it by saying the ship could be serviced internally. But he was definitely going for his own kind of aesthetic. That aesthetic was attempted in a very big way in the opalescent finish of the TMP Enterprise, combined with Roddenberry’s desire for detail. That’s why, though I prefer the raw functionality of the TOS design, the TMP refit is the purest expression of both men’s ideas.