Was very disappointed with the lack of spinning ball nacelle caps (was expecting something like the nacelles we got on the PHOENIX 17 years later), but was more disappointed Scotty didn't have Doohan's beard, which made him look like Sean Connery's thicker brother.
Honestly, the lights installed in the ship and the hull sheen enhanced an already pretty darn good redesign (though I also was no fan of the 'strongback' linking dish and secondary hull - it seems boxy by comparison with everything else.)
Now the interiors ... I found THOSE a real mixed batch. Liked corridors and lots of engineering, hated just about everything else, in color scheme, design and execution.