I'm surprised no one is talking about Diana.
The buffs this patch are really nice. Just out of the couple games I've played so far, all this extra attack speed stuffed into her kit makes her feel SO much smoother. It also allows her to not build any attack speed in her items, and just go straight damage. Take a little attack speed in runes and masteries, and you'll be just fine!
The mana return is also nice, but not really noticeable. It's not like she was struggling for mana anyway......unless jungle Diana was (I play her mid lane, so, I wouldn't know).
Has anyone who has played her so far ever tried maxing E second (after Q....obviously) yet? Because, with this extra attack speed, it may just be a viable option now. Though, the extra damage/shield strength from her W is still very handy to have. I'd still say W is better to max second, but I can certainly see some people maxing E now.