Just watched it and enjoyed it quite a bit. I thought a lot of the jokes were good (especially sight gags and Rocket's reation to Kevin Bacon calling him a Racoon), the two songs were surprisingly good, it'll be something that can be rewatched in years to come since it carries that holiday factor. It also allowed some of the side characters to shine amongst the group while getting a head start on a plot line that will likely play into GOTG 3 in a big enough way to where i'm glad that we won't have to waste time in that movie doing a long reveal.
It was also nice to see the debut of Cosmo. I just played the GotG video game from 2021 in which Cosmo is a major side character, but it left me with reservations on how exactly it would play in lave action and from what we saw, I think it works fine. Aged up Groot to whatever age he's supposed to be at now look a bit weird though. Looked like he had almost come grown full cycle back to his age in GotG (2014), but meant to be a tad younger and just slightly off-putting.