Yo thanks for the high praise. I've read neither of the books you mention, but I am familiar with the Culture series and I do find them very much in line with Lancer (other than the bits about the Culture try'n to 'civilize' everyone).
Also, you bring up some good points. Your note about an introdcutory exposition is well put, and I'm glad to say that I'm in the midst of finishing up a massive update to the layout, text, and some game mechanics. Just putting some professional touches on the field guide. The end product will have what you and others point out is missing in terms of table setting and the like.
I'm happy you've enjoyed reading it the guide so far. But I'd be remiss if I didn't offer you the chance to jump into one of my games! I run them like once a week. Feel free to message me and i'll send you an invite!
-hope to see you around!