Hm.. Sounds interesting - though I can't really see myself marrying another to make an in game family, though.
Maybe if I pester one of my siblings? Hah, that would be both hilarious and weird. But at least there's benefits xD
On another note, I'm interested to see how people would react to all these new features. Actually, this kind of reminds me of Mabinogi, but much more detailed and fun-sounding!~
And perhaps there could be some sort of in-game journal thing? Since reincarnation seems to be possible, it would be truly awesome to find a possession of one of your previous characters in a later playthrough.