Hands on :
I hate the side swipe on the lockscreen(bottom up was way better);
I love the side-switch to task manager(n9 ui ftw)
I am ok with having the apps accessible always from the bottom;
Finally a statusbar

Bottomline: it feels like an iphone, ui wise...
Yes, the old ui was maybe too sequential; but they could have kept the unlocking with a Swipe-up, no? And then maybe replace the useless ambience side-swipe switcher with task screen.