True, the colors have changed over the years; the upper of the two "bands" designed for the first Daleks was replaced with "slats" and an underlying mesh screen; the "flashers" went from bulbs to shallow cones, and the "bumper" has been thickened and later narrowed, but otherwise, the basic "shell" remained the same until "remembrance..." when all new castings were made. But even that and years later the RTD "bronze" Daleks possessed very similar symmetries. If one were to overlay those outlines, making sure the "skirts" were aligned, one would discover there is very little variance in the overall proportions. (I think the white Imperial casings might veer a tad more than even the bronze design.) Even MechMaster, a talented Cinema4D modeler who posts the "Second Empire" 3D rendered comic, his primary Dalek designs stick to that classic symmetry even though he gives them claws instead of plungers and all sorts of of greebled detail like indicators and vents.
But if one were to place the "New Paradigm" shape over the others (even if it were scaled down to fit), one can not deny the overall shape just does not fit in the least.
Several digital modelers have accepted the challenge of taking Moffett's design, keeping the "unique" elements like the recessed seam on the dome, the "nested" flanges in the "neck", the "tool hatch" at the back, etc, but adjusting the overall proportions to more closely match the Ray Cusick plans. And the response has been overwhelmingly favorable.
Point is, yeah, tweak those details all you want, Shoot, make the hemis upon the skirt "plasma balls" like you find in the novelty stores, but keep the "classic" outline. Those proportions are heavily ingrained in viewers minds, and if they veer from the "norm", people notice even if they can't consciously point out exactly what it is.
Sincerely,
Bill