I think everyone's looking at the 6D as some sort of crippled Mk3. They're missing the point: the 6D represents a stripped down approach to full frame. Its as though Canon looked at the Mk3 and said "What don't we need on this camera?"
... in this case, they could just have added the full-blown firmware - why can I play audio files along side my in-camera slide show, but cannot save hdr source files or do raw hdr? This is software crippling by removal of features, just like removing 1/8000 shutter or 1/200 x-sync is on the hardware side. Beware, it's absolutely terrific you like the 6d just as it is.
4) Focus peaking (not just confirmation)
You do know Magic Lantern has focus peaking and then some, right?
I've used the 6D in the rain and in the cold. It's plenty robust. To call this camera "entry-level" is nonsense.
Your opinion of other people's opinions is appreciated. However, one word of warning from bad experience - the 6d's sealing isn't as sturdy as (semi-)pro camera bodies like the 5d3 or 7d, using the 6d in rain w/o any damage basically comes down to even more luck than with other non-1d cameras.