Well, the original Battlestar Galactica was a product of the upbeat disco 70's, which fell victim to too many sappy story lines with little or no true dramatic weight. It had one of the lowest budgets in history and was canceled during its first season for abysmal ratings. The show was a disaster before it saw out its first year.
The new show had to reinvent, there was too little it could carry from the original and hope to be successful, but what Ron Moore has done is taken that very basic premise and turned it into something thats been on the air 5 years now and has everyone talking, raising the bar for scifi.
Thats not to say its perfect and season 2 took quite a dive in quality during the first half of the season, picking way up again with the "Pegasus" two parter. Season 4 meandered (purposefully though) then again picked up midseason. And there are strange moments like any other show, low points, annoyances etc
I'll just say, nearly everything in the show, no matter how minor has something meaning at some point, it is serious despite some dark humour and Baltar doubling as a sort of comic relief character and is worth watching sometimes just for Batlar and 6 alone. Its when they bring 3 into it later on it gets a bit wonky. Shes a better character on her own.
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He didn't just threaten, he actually got the entire production cast up in court citing something like 17 major similarities between Battlestar Galactica and his creation Star Wars.
But they counter sued, citing a larger number of rip off's Star Wars had used but never given credit for (several older films and television shows in the 60's and 70's), so technically Lucas was even more guilty than they were. So he dropped the lawsuit and Galactica went ahead, and Lucas wasn't counter sued.
Had they not, and fought it out 'til the end we wouldn't have had Galactica or the last two Star Wars films. Galactica wouldn't have even had half a season on air to have the remake all these years later, and Star Wars would have died in obscurity with a single film.