The bridge in Trek VI is even more puzzling, as the turbo lift doors are aligned differently, which would require that the tubes themselves would have been moves (which is obviously a major undertaking).
Actually, I'd think it's a relatively trivial adjustment. More like moving the signpost for a bus stop than building an all-new road.
What I figure goes on with those turbolifts is that there's one vertical shaft in TOS and two in the movies that stay put. The lift station is
never atop that shaft. Instead, it's a bit to the side, so that a spare turbolift can park there and wait for an urgent call without preventing other lifts from arriving from down below. (In the movies, there may even be a curving horizontal cross-shaft for such parking and shuffling. Depends on how deep you feel the bridge is inset into the hull. Quite possibly the saucertop docking port assembly is one deck above the bridge, explaining why it is accessed from the bridge via turbolift rather than a simple door.)
In some bridge layouts, the holding stations are inboard of the vertical shafts. In others, they are outboard. Or clockwise, or counterclockwise, creating the range of designs we see. Each and every bridge wedge is just as "wild" in the Starfleet reality as it is in the Desilu/Paramount one, and instead of pulling out the entire bridge, Starfleet can replace those wedges as it sees fit.
Sometimes it may indeed be quicker to pull out the entire bridge, and perhaps the entire "apple core" of the saucer center axis, and replace this massive data-processing element (sensors at top and bottom, bridge below top sensors, lots of computers in between, perhaps saucer auxiliary control also included in the mix) as a whole. This may have happened between ST4 and ST5. I doubt it happened at any other time in the history of the E-nil or the E-A, though...
Timo Saloniemi