Maybe its a convertible. You press a button and the nacelle pylons slide backwards, the front opens up into a window...
You
do realize that at least a few fans have
for decades been quite earnestly proposing more or less exactly this to explain why the
Enterprise was constantly switching back and forth between at least three different configurations from
shot to shot throughout TOS, right?
Mind you, I was never one of them
myself, always having viewed it from the perspective that re-using stock footage shot for earlier episodes was a simple necessity and didn't indicate this was something going on in-universe. Yet, I have to admit I always found it a rather clever and imaginative suggestion when it came up. You may recall that, a while back, I
half-facetiously proposed that the so-called D7 from DSC might be imagined to be capable of performing a similar feat, with the neck extending and nacelles unfurling from beneath and the "shoulder pads" retracting to take their place!
Laugh it up all you like, but it's scarcely as if ships with moving parts and variable geometries are an unfamiliar thing to us in
Trek, including examples of such in use by both the Klingons (STIII) and the Federation (VGR).
It sounds like he's agreeing with fans who think the TOS enterprise looks more advanced because it's smooth and simpler.
And with Matt Jefferies as well:
Although they now had a shape, it was not the end of Jefferies’ efforts. He theorized that since space was an extremely dangerous place, starship engineers would not put any important machinery on the outside of their vessel. This meant that, logically, the hull would be smooth.
Not everyone agreed with Jefferies and he had to fight his corner. “I constantly had to fight anyone who wanted to put surface details on the thing,” he says. Another advantage of the smooth design was that it would reflect light, and at this point it was not a foregone conclusion that the ship would be white. “I thought the atmosphere or lack of it out there in space might produce different colors, and this gave us a chance to be able to play light and to throw color on it.”
http://forgottentrek.com/designing-the-first-enterprise/
Maybe he does agree, but he was directed to update the look so he did. A perfectly smooth hull wasn't going to cut it with the people in charge or (probably) most fans.
However, we should note that in doing so, he gave conscious consideration to how the ship might nevertheless physically evolve into the familiar TOS version over time, little by little, even if some of his specific concepts ended up being further modified later. For instance, as quoted somewhere upthread: "...
we split the struts so in time the cooling vent side could be removed to make it more like the Original TOS strut."
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MMoM