Yes, I think it's too late to delay the release. Tomorrow you can buy it in stores (at least in Germany, but I think in other countries as well), so there should be a game to play. I don't care if I can play it tomorrow or on Sunday, I am only worried about the release dates of the next books. Amazon.de says there will be one every 10-12 weeks. I hope that's true. Had some bad experiences with The Wolf Among Us.
The German retail release (retail in name only) will not work without substantial Steam auto-updates, which naturally only become available once RTG uploads the full game to Valve's servers. So absolutely nothing won for the few German people who buy the game via Amazon or brick and mortar stores...
TWaU was supposed to be released in four to five months total and in fact did release within eight months. Total playing time was seven to eight hours. Chapters is planned to conclude within 10 or 11 months or so, easily rendering 10+ hours of gameplay in total. I expect delays to happen, but I also expect the individual episodes to have far more of an impact concerning the story.
Hey Ubisoft, you can keep your "seamless vast online GTA in space" to yourselves. Signed, one of the greatest Beyond Good & Evil fans alive.