What I expect out of it is for the pictures to look at least as good as other 1D cameras or 5D's but most pictures I see on here look like they came from a rebel there are a few exceptions but very few. Maybe it's the photographer maybe not. It's just my opinion.
I see a difference in image IQ with my 1DX being somewhat better than my 1DIII, and with the gap increasing significantly as ISO increases above 1600.
The benefit of this camera, in my mind, is to quickly lock and retain focus on fast moving targets and get pictures such as this:
and like this:
While I could get pictures like that with my 1DIII, the camera did not lock and load nearly as fast or consistently as the 1DX does. Thus, with the 1DX I get a much higher percentage of in focus shots. This is even more true at ISOs in the 6400 to 12,800 range which is not out of question in some of the gyms out there.
The incremental difference in IQ is not the compelling reason to buy a 1DX.
I've looked at the link to your pictures, and have to agree that for the type of subjects you shoot, the 1DX would not be worth the expense. The 5DII is a great camera, and I would continue using it.