So the general consensus seems to be along the lines of "LBB6 may not be the best possible system, but it's good enough; and if you have something that works for you, use it."
I should expand on what I said earlier a bit more. For habitability, I generally will use Stephen Dole's Habitable Planets for Man, not so much for system design, but for determining what is needed for a habitable planet, including ones that may have been played with a bit by either the Ancients, or for my Out Rim Sector, the Krell, the Bald Space Rovers, or another earlier space-faring civilization, harking back to works by Andre Norton. I am not a fan of designing a full system mainly because I view that as too fine a detail, unless your players are set on working in a single system.
If I need tides, which normally I do, then the planet has a moon large enough to cause tides. I understand that the Sun causes tides as well, but the combination of a Sun and a substantial moon makes for more difference. I have seen the tidal range in the Cook Inlet, which is one of the larger ranges in the world, and also some of the tidal ranges in England.
I do allow for what are called "Eye Ball" worlds, where you have a habitable belt at the North-South equator, when a planet is tidally locked to a star in the right zone for life, as Mercury is supposed to be in Space: 1889. Then, there is also a possibility of something like Mesklin, in Hal Clement's
Mission of Gravity. where you might have the ability to land at the planet equator, but because of a steep gravity gradient, you are limited as to how far you can go north or south. I do not think that it is possible to generate something like that using Book 6.