This is a great camera for sure. I am glad that Canon addressed the DR issue at least to a competitive level, which, honestly it is all is needed for most humans. Better AF, 4K (60fps!) dual pix and touchscreen. Great news. A even more refined camera than the 1DX.
From my side:
my old 1DX will still do all is really needed in action photography. I am far more excited about my A7RII capabilities, and I am curios what Sony has to offer next. If the 1DXIII will be our in 4 years, Canon better come out with a novel product seen the pace at which Sony is improving its mirrorless system. For me it is already A7RII 80-90% of the times I grab a body.