Not as Thrilled -
The still image quality is not as good as my fuji x100s. It's just not as sharp and detailed. Maybe I need to get a fixed lens though for a fair comparison.
What lenses are you using?
I own a 70D, and it has the best IQ of any Canon crop I've used. I'd consider it a significant upgrade in IQ over the 7D I owned. I'm using L primes and zooms, with a couple non-L primes.
Your lenses may need to be micro-adjusted.
I own the 6D as well. It's a different beast. Both get the job done and have better IQ than what I replaced them with (7D and 5D II).