I don't know about Go-Busters's toys sales, but its ratings are very low.
Go-Busters's toy sales figures are a very weird thing. Bandai is projecting 11 billion yen, which is a very strong number (on par with shows like Shinkenger). There is anecdotal evidence to suggest that Go-Buster Ace is a very popular toy.
That said, there's two big question marks floating over Bandai's projections. One, Bandai extended the Ranger Key line into the 2012, so all Ranger Key sales count toward Super Sentai's merchandise total. Two, it is not known if sales of Akibaranger goods are counting toward the Super Sentai title. So basically we don't know how much of that 11 billion yen in projected sales stems from Go-Busters, what stems from other things.
Moreover, Timeranger and Go-Busters have at least two elements in common: Yasuko Kobayashi and a serious tone.
Thinking it over, they might have a third. The last arc of Timeranger is dominated by the TimeFire character. As I've gotten older, I've begun to wonder if TimeFire was a character who meant to be a part of the show, or something tacked-on to goose toy sales. The anecdotes about the Timeranger line talk about how kids really liked the roleplay toys, but disliked the robot toys. TimeFire's robot being a T-Rex makes a lot of sense as an attempt by Bandai to get a robot into the show who appeals to kids a bit more, and failing that, just add in another popular character with a fresh line of roleplay toys.
TimeFire is a good character, and his storyline is quite memorable. If he wasn't planned as part of the show, he still basically makes sense as something to introduce into it. I feel like the current arc of Go-Busters may be a similar sort of thing, something unplanned and designed to goose ratings, but still basically logical and possibly quite interesting. I can't say whether or not it's memorable or not yet, because I think a lot of my final opinion about Go-Busters is going to hinge on how the current storyarcs end. TimeFire's story certainly came to a memorable end, so there may yet be something really interesting that can come out of Enter's back-up plan.
What exactly were they trying to do with Gobusters?
Something about Kobayashi that's rarely discussed is how she is, pretty clearly, fond of Ultraman. Many of her series echo elements of particular Ultraman series that predate them. In the case of Go-Busters, I'm beginning to think she was inspired by Ultraman Nexus. The story of Ultraman Nexus is, basically, using the progression of the year-long plot to chart the development of an ordinary but well-meaning young man into a true hero.
If you watch Go-Busters, a plot thread that surfaces occasionally is the idea that Hiromu isn't quite a hero yet. It would make a lot of sense if, as originally planned, Hiromu's big speech about shutting down Messiah in episode 30 was going to be the capstone of his character arc. It would be the moment where he went from angry but well-meaning kid to a proper, memorable Red.
The idea of spending the entire series charting a character's development from ordinary person to hero is something Sentai has used for secondary characters before, but never for the main character (and Red is, 95% of the time, any given Sentai show's main character). It's a compelling idea, and I wonder if Go-Busters stumbled by simply over-estimating the audience's attention span.
About toy sales, are those low numbers even official? I don't know if it was ever confirmed.
The source of the Timeranger toy sales is Bandai's annual financial report, the same as the Go-Busters numbers. They're official and confirmed, more or less.
Yeah, that's the thing. Timeranger didn't try to change Sentai, it was an attempt to emulate the mood of the early days,
I'm not sure I can agree with this. Timeranger doesn't feel very much at all like early shows like BFJ or Goranger, or even 80s shows with sci-fi underpinnings like Flashman or Changeman. Timeranger is a lot more character-driven, and the approach to action is more cinematic and less visceral. I feel Timeranger was part of a big experiment to change Sentai that also included Go Go V, and was ultimately just not successful. It's Gaoranger that ends up dictating the tone and style of the 2000s, for good or ill.