This has absolutely nothing to do with technique. My technique is not the problem. Neither is it an exposure problem.
No, it's a problem of what you have built up in your mind. You imagine that with Exmor you could just ditch bracketing, HDR, GND. You can't. The cases were Exmor lets you get away with a single exposure are relatively rare. They come up. They are not the majority.
If your blend/HDR/GND shot is correct then you should NOT have to push shadows or deal with shadow noise. In my blends my shadows are typically brighter then I want them to be, and one of my final steps is pulling them back down.
I have never struggled with shadow noise in a blend where I had a properly exposed frame for the shadows.
This is where your Photographic DR is unhelpful. Your Photographic DR tells you nothing about the literal, physical capabilities of the hardware.
Except, of course, for the system's DR
However, given Canon's trend...I fully expect RN at low ISO to INCREASE. The 7D had 8.6e-. The 70D has 13.5e- (and with smaller pixels to boot!)
Yet the 70D has...observably
...2 more stops of total DR. Once again trying to convert sensel SNR ('engineering DR') to actual system photographic DR fails
IMO, HDR, sky replacement, tonemapping, manual blending, etc. shouldn't be necessary unless you have a truly extreme situation.
Landscapes involving bright skies and shadowed foregrounds have more then 13 stops of luminance range and require management (HDR; blending; GND) with ANY modern camera. Interior shots with windows also often require this.
Outside of this most scenes have less luminance range.
It's entirely possible I like to shoot scenes with more dynamic range. It's also entirely possible my standards are higher than yours (that's not an insult, people have different standards).
It's entirely possible your beliefs about the difference Exmor would make are based on little more then imagination, and it's time for you to buy/rent a Nikon or Sony and find out