To me, Legacy was more of them pulling out all the stops than Vintage has been...
Don't get me wrong, love the cards, but Legacy/BAD was cheaper, gave you basically 1 or 2 figures per wave extra with the pack-in parts... Other than the card, it was really ideal, at least to me. 30AC was a really banner year for the collectors too, between the main line and Legends both really appealing to the collector.
That said, Clone Wars has the kids... I know when I'm in the toy aisle and see kids or parents looking over figures, it's always the animated stuff. I can't blame them, but the two lines (and I consider them separate) competing against one another has been the bane of the realistic line now for some time I'm afraid. The clear separation means one line has the kids, with some collectors, while the other line has practically only collectors... Collectors cannot alone support the line, and it's starting to show.
It makes me wonder sometimes, had the CW line been realistic styled from the get-go, and movie/CW figures were a little more integrated, would things be as they are today? I don't know.