i like all FFs but being that V, VI, VII, VIII & X are all rank pretty high with me, its sad news. However, I doubt he'll never work on another one ever, after KH3 and the side titles, what else is he gonna do?

Kingdom Hearts was doomed from the start, so I'd be more than glad if Nomura would focus all his "talent" that way. Then something would just have to be done about Kitase and Toriyama, and Final Fantasy may actually have a shot at quality again.
i must say you have an interesting definition of "doomed." While i myself don't have any interest in them, the KH games have been immensely successful and receive consistently great reviews upon release. The same could be said about your definition of "quality". VII, VIII, & X are the most successful installments in the series not only commercially but critically as well. The only ones who would disagree with the latter (not even critics themselves) are, ironically, people on internet forums such as these. and they are in the minority, all the while insisting that what they say is true.