If the f/8 AF limitation was a pragmatic compromise that enabled superior AF at faster apertures then I have no problem with it. Probably <1% of all shots taken worldwide would be taken with f/8 max aperture setups. That's definately unfortunate for the ultra telephoto shooters, but I guess the majority needs priority.
1DX limitations? How about the long complained about mirror lockup function being buried deep in the CF menus.
There is a downside to the demise of the SD slot: the EOS-1D X will not take an Eye-Fi wireless/memory SDHC combo card. I know the upcoming bolt-on Wireless Transmitter WFT-E6A
should answer most of the critisisms of the older WFT series, but even a modest built in WiFi function would be extremely useful. I use the SD sized EyeFi
to stream small JPEG files to iPad while the RAW files go to CF. I'll really miss this with the twin CF 1DX.
But for the most part the 1DX looks brilliant. There's always room for more refinement, and you'll never get a full set of functions that will 100% satisfy every photographer on the planet. But wow, the 1DX is going to check a lot of boxes for me.