I've only watched a few of the episodes on Season 3 bluray (Peak Performance and Emissary) and so far I think the quality is decent, there were a few complaints such as some of the ships looked a little too plastic-y and the planets a little blurry but overall I am happy. With that said, I do hope that Season 3 is done better. I'm Currently watching Q Who.
At the end of Peak Performance when the camera is moving away from the Enterprise, I noticed for the very first time that you can see people walking around in the red spherical are on top of the ship... I can't remember the name of it. Has anyone else noticed this on the DVDs or is it new the the Blurays due to the clarity?