As I've opined in other threads of this type, the remastering is unnecessary, but so is TOS... or almost anything, for that matter.
I've enjoyed what little I've experienced of TOS-R, and I enjoy and prefer the original versions of the episodes. Both are fun, and neither version looks at all realistic. Each version is a different flavor of "stylized reality," and that's okay.
One simple look at the comparison on the same disk proves this is wrong.
If you believe that glowing beams of light in space look realistic, or ships lit with strong ambient light while in interstellar space look realistic, then I stand corrected.