Well that's good that it's already been fully re-mastered for streaming and this is just a formal physical release of those remasters. Whenever I see a new Blu-ray release for SD content these days I worry that they'll just run it through an AI upscaler and try to sell that. Or worse, they'll "re-master" it like they did on Buffy and and Angel.
They made seasons shot for 4:3 into widescreen, puting things into shots that were not supposed to be there. They just plain didn't do color correction for some scenes. There's videos on YouTube highlighting how it was kind of a disaster. Unfortunately it's also the only way to stream it these days.
@asperoth Also many of the special effects were not re-done, but simply scaled up from the regular versions to HD. As you can imagine, that’s not a good look.