I think this is the big thing at play. I think you looked at it from a different point of view than most people. I think most people, like myself, viewed it just as an accessory. It couldn't be looked at as a stand-alone toy, in and of itself, or reviewed separately like that, since you wouldn't, for example, go out and buy Optimus Prime's trailer on its own, and be content with that, you know? What would be the point? No one would buy the Sound Booster on its own and not get the VF-19.
The review is solid in terms of looking at the merits of the Sound Boosters as is, but it's the overall package that really matters. I do agree it is unnecessarily complicated for an accessory that, let's be honest, doesn't even stay attached very well. If one were to try to "play" with the VF-19 with the Sound Boosters, they'd find the Sound Boosters fall off easily. I would have rather had Yamato focus more on sturdy perfect transformation attachment, than on unnecessarily complicated ways to open and close things. I think most people were willing to forgive the MSRP because of how awesome this thing looks completed.
Full disclosure: I HATE Macross 7. Hate it, hate it, hate it. I have tried multiple times over the years to watch the show, but can never get past the first few episodes. I can't do it. People say it gets better, but I call BS. I think an ridiculous show. But I got the VF-19. And I got it, even though I preferred the look of the Blazer, solely because of the Sound Boosters. They made a McDonald's toy look killer. That's what sealed the deal for me, and I do not regret dropping all that money on a toy from a series I absolutely cannot stand. The only thing that makes me annoyed about this toy is the fact that it comes from an Anime I hate.