Well, to me it seems ok. It seems it's more productive, thanks to window pinning, object browser enhancements, etc.
I like the countdown seconds when executing a query, it feels faster somehow...
There are couple things to improve productivity:
a) I don't like forward declarations of procedures/functions to be on the procedure tree in package editor window, please make that configurable (I remember was it 5th or 6th version where it was ok, no forward declarations).
b) partition support is not good, no dedicated info about partition/subpartition
c) it really would be good to scroll down to line after pressing first letter of column in describe windows (now if you have 100 cols and press "z" it doesn't go to column starting with "z", however it selects it)
d) can You make dragging a column from result set to window in SQL Window will paste it's name there
Just my opinion, but somehow this is more release +1 than version +1