The remastered TOS episodes bugged me with quite a few of their changes. I appreciated the new digital mattes but the CG ships were terrible. Should have just recreated all of the shots with real models. Probably wouldn't have been that difficult. They did recycle a lot of the same shots throughout the series. =P But yeah things like how they changed the Tholian ships to look more mechanical when the interior of their ships clearly showed an alien crystal based technology, just irked me.
So far the TNG remastered episodes look amazing and very faithful to the originals. There's also this:
Drexler, Curry & Takemura Join Remastering Project
Doug Drexler (Make-up Artist & Visual Effects Artist, TNG) has announced on his blog the DrexFiles that he will be working on the Star Trek: The Next Generation remastered project alongside Dan Curry (Visual Effects Supervisor, TNG), David Takemura (Visual Effects Artist, TNG) and Michael & Denise Okuda. In his blog, Drexler announces the commitment of the project to remain "100% true to the original."
"You heard right, this time around Paramount is bringing in a team that lived TNG as it happened. Dan, as I’m sure you know, was the visual effects supervisor on Next Gen. Unlike the remastering of TOS, this job will be 100% true to the original. Visual effects shots will not be reinvented, pulling you out of the show. What’s about to happen is truly extraordinary. The studio has saved all the original footage, and VFX elements from the good old days.. We will be recompositing them, and then outputting them in high definition. Here and there, elements have been lost, and we will recreate only those missing pieces, and with this promise: aside from looking like you had your windshield cleaned, you won’t know the difference. Star Trek:The Next Generation is Gene Roddenberry’s legacy, it is culturally significant, and we will rejuvenate the show with curatorial eyes only. Paramount Picture deserves a round of applause, and I can’t wait to dig in with my friends."