I disagree, Aulrick. I thought it was more about them consummating their relationship as equals. Aviendha considers their first night together as a loss of honour and refused to go to him as merely an apprentice - I saw their night before the war as sort of a wedding night.
I also think if he...
Honestly I just always assumed the Flame of Tar Valon was the white section of yin/yang, and the fang the black section. That's what they're shaped like, that was the symbol of the Aes Sedai in the Age of Legends (symbolising equal power and balance). It seems obvious to me?
Corwin, Morgase and Tallanvor got married and then went off to Caemlyn to advise Elayne. I don't remember where they went after, I just assumed they were in the Andor contingent at Merrilor. Does that help?
Raeviendha, I totally get it. I liked the Harry Potter ending. I like my series to be complete! Especially when I've devoted ten years of my life to falling in love with these people :D