It does tie up the storyline he was writing in Guardians. IW started out Amazing. I loved the buildup with Gamora. I don’t want to go into detail because of spoilers but Duggan did a very good job with all the characters. There was a huge cast of characters and he managed the cast well.
After the big reveal, i felt it lost some steam because all the side issues were a mixed bag but the omnibus should have them all included because the main book picks up on the info from those books…
it also split into 2 stories which cut the tension and did not recover when merged back together to handle the end story, IMO. The Drax storyline in the 2nd half was good like Jake said.
Also the Cates GotG directly follows Infinity War carrying on a major plot question left open at the end of IW.