I haven't had a chance to have a "proper" play yet, just a few indoor snapshots with the filters and a brief fiddle with the Quick Menu.
My initial reaction with the filters is perhaps unsurprising. They are quite fun as a novelty, but I doubt that I will be using them regularly. I agree with Nippa; the partial colour filters seem very hit and miss. For example, we have purple walls in our bathroom (my wife's choice, not mine!) and when I tried the purple filter, it only picked up the walls in certain areas. I do quite like the Dynamic Tone Filter though, as this gives a similar effect to some of the Drama Effects in Snapseed.
As for the Quick Menu that is now behind the RAW Button....I like...alot! It makes changing everyday settings very convenient as they are all grouped together. It looks like the items that appear in the Quick Menu are specific to the mode that your camera is set to at the time as well, which is kinda cool.
For those of you who are worried about losing the convenience of the RAW Button to toggle between RAW and JPEG, simply set the FN Button to do this instead, because the majority of the functions that you could assign to the FN Button now appear in the Quick Menu.
These appear to be the only changes that V2.0 firmware bring to the party, so don't expect huge improvements to image quality or overall usability. This seems to be the same as V1.03.
Hope this helps all.
Cheers
Neil