In the episode 1 of What If...?, the story follows the same events as in the first Captain America movie, but with Peggy Carter as Captain Carter. The other characters have the same roles until the timeline is affected by the different Captain.
In the episode 2, titled What If... T'Challa Became a Star-Lord?, the universe is much different:
- Gamora is missing, she must have been raised by Thanos as in the original timeline, and should still follow him, like Nebula do
- Taneleer Tivan/Collector has powers and use weapons
The story begins when T'Challa is chosen by the Ravagers instead of Peter Quill, it should affect the timeline but Gamora and Collector are affected too, presumably before Star-Lord meet them.
Why don't we see the universe that follow the same story and characters as in the Guardians of the Galaxy movie but the only change is the different Star-Lord, and how it affected Yondu and his crew, then Thanos, etc.?