It's a great game. I just finished the main story ~45 hours in, with 100% exploration (not collection) on each planet. They really took everything good about the first game and built on that, which is exactly what I was hoping for.
I'm very glad that they mostly kept continuity with powers/abilities from the previous game, i.e. they didn't really regress Cal or BD's powers/abilities in the new game (some things go a bit backwards, but probably necessary for gating some of the exploration stuff) which is I think a lazy mistake that a lot of sequels make. I didn't spend tens of hours in your previous game to then build the same character from scratch in the next. Instead, there's mostly just more development in there building on top of what they learned/discovered in the first game.
The environments are stunning, and I'm glad I was able to enjoy them after they fixed the PC performance issues. I'm hoping they do something like add more planets in DLC.
Story was great, really stomps on the gas once you reach a certain point (if you've hit it, you know what I mean).