The Guristas are not "another megacorp." They may have their place, but they exist outside Caldari society specifically -- their status as outsiders is what makes them useful as a outlet to the Caldari. They may carry some degree of respect and honor (as the yakuza in Japan or the Triads in China), but they are definitely not seen as being part of legitimate Caldari society. In a society that is all about face, no Gurista (at least, no known Gurista -- Gariushi never disclosed his past for a reason) would ever be accorded the respect of a legitimate member of the Caldari executive class.
If that is the intention, I will be extremely disappointed. CCP seems to have a hard-on for the pirate factions, which rankles me to no end.