Hi,
first off: I love that finally we are seeing more affordable FF cameras. I think that 2099 EUR is reasonable for the first generation of these... BUT

what I dislike about the 6D:
* 97% Viewfinder - WHY? not at that price
* AF system... Why not include an AF system like in the 7D? that would have been way better
* Direct internet connection to upload photos on Facebook? 2099 EUR to upload a 5MP picture on Facebook? well my phone was much cheaper

Why not do it over the phone sync?
* (Canon Sensors in general): low dynamic range compared to competition (Sony, Nikon, Pentax)
what I like:
* very good low light performance, if it is anything close to the 5DIII
* 2/3 of the MSRP price of the 5DIII
The FPS is neutral as I only used my 5.7 fps once in a Zoo (I have a 60D) but 6 would have been nice. I usually only take one picture and do not fire away.
I agree with many of you: if the price is 2099 EUR than the feature set needs to be higher, and if the feature set remains what it is now (the way more likely option), I could justify the price at 1500-1700 EUR as it is a very solid low light performer (apparently).
Rumors have it though, that Canon is announcing a 70D/7DII mix in early 2013 with better dynamic range and 2 stops better low light performance than the current 7D... I will definitely wait until then to decide

I have too many cropped lenses to just jump on FF right now...