Was not unhappy with LR5 really but heard all the buzz about the profiles in C1 so I tried it
my 6D seems absolutely made for C1 and the images are great with little or no input by me
You say your 6D seems made for C1.
It's more accurate to say that C1 is made (or significantly fine tuned and tweaked) for your 6D
That is to say, the image quality team ("Image Core" as they are known internally) spends a lot of time tweaking the algorithms C1 uses for each of the cameras it supports. You the results of this extra work more prominently in mainstream cameras (5DIII, D800) and cameras the image quality team themselves especially like personally (Fuji X Pro 1) than the "aslo ran" cameras (e.g. Panasonic point and shoots). So the fact your 6D raw files especially pop in C1 vs LR in your opinion is not at all surprising to me. This extra effort is especially true in the area of color where extensive real world shooting, laboratory testing, numerical analysis, and by-eye adjusting is done to make the files from each camera sing. No where is this more true than for their own cameras (Phase One and Mamiya Leaf digital backs) where they have an obvious financial incentive and a intra-company camaraderie and favorable logistical ease to make the best result from their cameras (and it's the only camera where the software image-quality team can give direct feedback to the hardware R+D team on what hardware developments are positively/negatively affecting the final output, including software tweaks and optimizations).
It's easy for end users to assume that "compatibility" is the same as "optimized for" which is one reason why DNG seems so attractive at first - the end user assumes that since DNG files will open
in any DNG compliant software that this equates to "will be well supported and give great results". In reality adding basic support for a raw file (i.e. making sure it will open and be adjustable) is lightyears away from giving full-fledged support and optimization for a raw file.
Any MIDI reader can play a Bach score, but it takes an artistically talented, technically accurate, orchestra to really bring it to life. So the basic support that DNG promises (and doesn't always deliver on) is not really that helpful to those who have image quality as a high priority - what they need is software which has been specifically tuned to make their particular kind of raw file sing.