I don't see Fuji clipping highlights if I expose the shot properly, unless you are talking about JPEG's, then you have to make a choice in what you expose for. In fact the Fuji X-T2 has more dynamic range than the 5D3 [not hard that] so you have an easier time recovering information from your raw files. Also your blue colour will depend on what film simulation you choose to shoot your JPEG's with. If you are shooting raw it doesn't matter as only Adobe standard will be shown initially with you bring the files into Lightroom or ACR so your colour will be as accurate as it normally is.
Yep meaner, heaver, bigger but not the be all and end all... If you are looking for a small system that can handle just about everything you throw at it - Bingo! Fuji wins there.
Really depends on how invested one is. Moving completely from one system to another can be a little costly, but you can get a couple of lenses and a top Fuji body for the same price as one 5DIV. I sold all my Canon gear after a year of shooting Fuji, that covered the cost of me moving as well as freeing up some funds to boost up some lighting, modifiers and grip.
The T2 with the booster grip on boost mode gives very snappy AF and 14fps if you want it. Plenty of examples of it in the field working out great. All depends on how and what you shoot. I find Fuji to fit me and my stuff well. Weddings and events included, YMMV.
I always shoot standard/Provia with my Fuji bodies and change it later in RAW editing. The Blues always seem to be hard to achieve realistic tones when I shoot outdoor panoramic shots. Using the "in camera" panoramic photos the style is embedded so I cannot change in LR. This is why I'm just starting to stitch my fuji files using RAW.
I love the Canon 16-35 f/2.8mk2 (I need the mk3) and Fuji needs a faster UWA other than their current 10-24 f/4 with "ok" looking starbursts. Not sure if the OP does creative shots with sunflares or flash burst but Fuji doesn't provide me what I want in the lenses I own (i need more). Personal preference is such a bummer!!! If the OP is use to the newer generation Canon mk2 prime lens quality from a 24-70L f/2.8mk2 or 70-200 f/2.8mk2 the fuji provides more of the older generation micro contrast of their current zoom/prime lenses. This is something he'll figure out by actually testing fuji gear.
The OP is spoiled using the 1dxmk2. I know If I owned such a camera or even the 5dmk4 I would really expect a fuji to be on par if I was to replace it for an "emergency" backup camera.
I'm eager to hear what the OP experiences with his taste of Fuji for professional application especially if his Sony AF failed him.