Also the tumble changes buffed her crit. It used to be that both her q bonus and the aa itself rolled crit separately, but, here's the kicker, the crit q damage could ONLY apply if the aa crit as well.
So either, no crits, aa crits and bonus does not, or both crit.
Now its just crit, or no crit, which while not sounding much different, is actually a pretty significant damage increase at any value of crit lower than 100%; particularly at extremely low crit values the difference is readily apparent.
What this means is, she basically got a substantial buff to her early game damage with low crit. Seeing as how she now rushes IE -> Shiv, she is doing fucktons more damage early, and already scales way too fucking hard off crit chance and crit damage.