I swear, some people place Matt Jefferies and the Original Series on a Pedestal just a BIT too high for reality.
'kewl' as in faddish, representing the current trend of the day. In 1965, when she was first speced out, she would have had fins everywhere, chrome, and a LOT more whirling light effects. Ironically, she would have looked a lot more like the 'new' one.
'cool' as in something that WORKS and is impressive on its own merits. The only thing really wrong about the TOS design is that it lacks some details, the nacelle caps, and the dish. Each of which can be rather easily redone (and has been, indeed, in TOS-R). Heck, even my own drawings of the gray lady ADDS details which aren't on the 11-footer. But I do recognize that the basic design elements work.
So, that said, yes, the 'cool' TOS/TOS-R Enterprise, to me, looks more realistic and believable than the 'kewl' NuTrek Enterprise.