Okay, so followithrough is not exactly my strong suit. It took me eight years to finish a two year MA program, after all...

Well, Adventurous was conceived back in the early days of Next Gen, before the whole Warp 10 issue came about, and when transwarp was still truly experimental.

As far as the mechanics of it go, I refuse to acknowledge the very existence of the Voyager concept of transwarp. Instead, I see it much more like this and this.