I'm happy to see that you think the same way I do. I just think that there has to be something said for two centuries spent on weaving ties of politics, culture and even family within the Federation.
Sure Romulans are genetic relations but it's the Humans who live next door and then there's that Betazoid daughter-in-law....
It just seems there's so much to be said there. So if you as a writer find it interesting, please run with it. Look at Tuvok's family. You're not asking the Lit universe to do something that's not already there to be shaped.
Second, on the Cardassians, when I said all eyes are on them now and you said I might be surprised; please surprise me.