I recently got a Canon EOS 80D, the model was released about two month ago. I use digikam (v4.14.0) for post-processing, which uses LibRaw (v0.17.1) for RAW decoding. The decoded .CR2 files from the 80D are very "hazy", with low contrast and a blueish cast.
I attached a JPEG (just RAW decoding + highlights raised) to this post, the corresponding RAW file can be found at https://drive.google.com/file/d/0B-fwGolScP68dzRTek9oYXY1M28/view?usp=sh...
For if it helps, a user of RawTherapee reported a similar issue:
Hopefully the EOS 80D can be fully supported soon :)