Rather than forcing buyers to get a mediocre set of 1 Deluxe + 4 Basics, they should have elaborate their marketing tactics.. Like, releasing 5 separated figures on different waves, and on each of their bio or instruction, there's a hint for them to combine with the other. And by that, I'm agree with 1-Voyager + 4-Deluxes concept.

 

Y'know that would actualy work well in the show too, like at the start there's no hint that they combine in the show but after some episodes they have the perfect idea: "COMBINING UPGRADESSS!", and the Voyager mold of the set would be the last to be released and would come with the accesories for combining, that way all other toys could be stand on their own without combining gimmicks and only the voyager would be "compromised" for the whole combining thing, however as a Voyager he could still be a good toy for whoever lacks the other pieces.