fantastic game. a straight upgrade from GR1. BUUUUUUUUUUUUUUUUUUUUUUUUUUUUT its a bit buggy and overall rough around the edges when it comes to performance and stability. theres been a few moments where ive been softlocked in arenas because i got to em too fast and thus enemies wouldnt spawn, and a good handful of moments where the next chunk of the level hasnt loaded yet and id be looking into a void waiting for the rest of the level to show up. putting up with those hiccups however is worth it imo. the game itself is fantastic. the bosses/set pieces are top notch, the combat is just as good if not better than GR1, the new mechanics and enemy types the introduce were nice, the new outside sections with the bike were so much fun, even when those were when the hiccups and bugs were at their peak. kinda came off like the devs were getting a bit over-ambitious, but still the outside levels themselves were still a blast to play.
also the story being more human focus is a bit mixed, sometimes it works well, other times it fell flat and came off a bit cringe. but the expansion on the other ghostrunners themselves and the new antagonist(s) were really cool and learning their lore (and by extension jack's) was engaging, at least more so than the humans.
overall its a fantastic follow-up to GR1, and more than worth the $40, especially if you like GR1, BUT if you dont have the patience to put up with the jank or bugs, hold off till the game gets a few patches and hotfixes before giving it a try.

tl;dr
ghostrunner 2 is fantastic when its not buggy
worth it

UPDATE: after a bit more research, the most of the bugs ive come across might be a result of my graphics card finally getting a bit too old or outdated, your experience may be more stable. i have a NVIDIA geforce gtx 1060 for reference