This new synopsis is really underwelming. Inwas really hoping for more Shaw and David Ditto. This summary sounds about as exciting as the "origins" of how the Nostromo crew got assigned to the Nostromo.
That's an awesome idea!! Be hilarious to read about Parker going for drinks with Brett and hearing Ridley say goodbye to Amanda!
Since apparently this Covenant prequel novel can be fully realized, I wouldn't be surprised if a book like that got published. If you want "conflict" in the plot, you can explore how/why Ash was swapped onto the crew at the last minute, the formation of Special Order 937, etc.
A "prequel" novel I actually would like to see is one that explores the Ripley cloning project on the Auriga leading up to 'Alien Resurrection'. The genesis of the project, the 7 failed attempts (and whatever they took out of Ripley 7 that evidently wasn't good enough), I think there's a lot of room there for an interesting story and a good number of memorable characters (Wren, Gedimen, Perez).