Given the complexity, there's something to be said for a newb signing up for a world and having a few days to explore before it's full and ready to roll. Someone looking for a quick, simple game to play is less likely to be a devoted long-term player than someone who wants a game that requires a few days of learning before starting. "I sure wish I'd read ___ in the forums/help BEFORE crippling my first franchise" is not the ideal reaction of a new customer.
The quick start would be a good route if HBD had practice worlds like Sim Leagues' spring training leagues: Draft a team when you sign up; realize three days later that ERC and catchers' arms are huge, and that being a doubles hitter in a doubles park is meaningless; then go and sign up for a real league with at least some basic knowledge of how the game works.
Not much would be more counterproductive than someone joining and 2 days later getting the idea that the game is heavily slanted toward those who know hidden tricks (injury bug, pitch weighting, pitch descriptions not having any relevance, etc.). To use Mike's restuarant analogy, bad as the lousy meal would be, it would be worse to complain about it and have the waiter say "Oh, you should have asked for the manager's recommendation, not the chef's. All our regulars know that."