Yeah. I think the regular/advanced split makes sense. Maybe even more today than it did then.
Although, I tend to think the regular game could be more of a straight subset of the advanced than used to be the case.
Also, I've decided there shouldn't be an introductory product. There should be a box that is both the introductory product & the complete regular core rules. (Equivalent to the old Basic + Expert.)
Then maybe a few boxed supplement sets.
The regular game shouldn't be made with the intention of converting people into advanced players. Rather it should just try to sell them on itself & the hobby & be the best game it can for what it is trying to be. The people who want more will step up to the advanced themselves, & you don't want to turn away the people who are happy with the regular game by trying too hard to sell them something they don't want.