this is my opinion so take it or leave it.
what kind of name is diaspora? to me it just sounds like rubbish. that opinion out the way.
That is certainly a very poor reason for you not liking the name. "sounds like rubbish"? How about giving a real reason.
As for my own opinion, Diaspora first of all sounds VERY cool. Secondly, it is an smart name that actually has meaning and requires some level of intelligence for people to research what the word means, and teaches a new word for those who dont know it. Additionally, it is very fitting for the Battlestar Galactica story (and the Devs backstory) Last but not least, it is a catchy name, easy to remember and great for marketing and promotion as it is pretty unique.