Saw it. Loved it.
I didn't know that the Airbender/Korra showrunners where behind it. The animation and humor really stand out with it though.
There's plenty of nods to the old show, like when they launch the big ship they do the "activate interlocks, dynotherms bla bla bla" bit but that's the only time. When they form Voltron they still start with the lions flying up in formation but the sequence takes bout 10 seconds now rather than an entire minute like it used to.
Things are different, so if you literally can't handle any change to your precious nostalgia you probably won't like it. Keith isn't the leader, Princess Allura doesn't pilot a lion and pidge
so if you can't handle that, probably don't bother.
I will say though that they've built a big world here but don't really go to any lengths to explore it for the most part. So the team is from Earth, like in the original show, but instead of being explorers who were out actively looking for Voltron they just kind of happen to stumble across it buuuuuuut also maybe it's destiny kinda? Basically certain aspects don't really make sense all that much, or at least not as much as I'd like from the creators of Avatar.
All in all I watched everything available so far in a day or two and really want more. 7/10 gained points for having the mice, lost points when Princess Allura showcased a new secret power she had twice in one episode.