Far out, nice!
Good that they made mainstage an option, def one I will happily do without (but I can see the need for it).
Flex improvement is a great direction to take it aswell.
And wow, does anyone else remember when Logic Pro 7 was like $1.5k!?! This is cheap as chips
App store preview link is up too: https://itunes.apple.com/us/app/logic-pro-x/id634148309