I've never had a DJI product in which Dlog mode didn't affect sharpening. It might simply be the absence of any stylized color mode default sharpening, so not really 'purposefully softer', but the end result is the same. With color mode to standard and sharpness at 0, you're telling me the sharpness is identical to Dlog mode with sharpness at 0? I grade everything I shoot, and I can't speak to your specific copies of drones or footage, but on mine (ranging from P2's to current P4) is always like that. It's like looking at a DSLR raw file versus a jpeg-saved parameter, of course it's softer.
If you're getting nice clarity and sharpness on your P4 with Dlog, maybe DJI is just putting out a ton of copies with issues... because mine is ****, and looks like the sample vid further up this thread. Completely un-usable (and un-sharpenable).
Could you post a sample from yours, with full setting specs, no processing?
I already did that. edit: *** this turned into a lesson on color space and contrast. Sorry, but it was initially directed at your question.
But either way, trust me, the color settings have nothing AT ALL to do with sharpness. In your case where you are getting that horrible blur, something is happening which again might be triggered by going to the d-log color space but it in theory should do nothing to the blur.
It might pronounce it more because it's flat but you CANT CHANGE the softness or the sharpness using color.
D-log put simply is a better version of cinema-style. It gives you more dynamic range through gamma.
Think of it like this.
In color we are dealing with hue, saturation and lightness (HSL commonly referred) and there are a bunch of ways to augment these things.
Hue is basically the area on the wheel where you rest. Color is a range and nothing more which is why we white balance. Think of white balance as a compass for color where white is north (on a white balance) so it tells you what everything else should be.
Lightness - brightness level, etc. obvious but much more in depth than what I am writing here.
Safuration - this was once hard for me to define but when I was an instructor teaching these things, I had to learn a method to explain it and I came up with "volume of color". If you turned down the situation to 0, you will have black and white, if you crank it up, you get overblown redonculus colors.
Gamma is the X factor in D-log as it gives you the most dynamic range of contrast (and anyone that knows photography and film/videography knows how important contrast and therefore gamma is).
I know this isn't answering your direct question but I thought a thorough explanation of what is happening in the color space settings which has literally no effect on sharpness or blur (on its face) not what it might show would help you. And furthermore, you may have an issue.
I forgot that, if I remember correctly, you are a pro so forgive me if I am spewing a bunch of photography 101, actually more like 103 info at you but it's for everyone too.
Most won't read this but a couple that care about what these settings are and do might read it and possibly absorb it. It's actually a lot of second nature to some but a lot to grasp and fully understand how not only everything works, but how they work TOGETHER.
Film/video/photography is a push and pull game. If you boost something, you need to pull back something else.
Using RGB color space this is how you define every single pixel.
Every single pixel in a 4K image for example has 4 numbers associated with it R(ed) level 1-155 G(reen) level 1-155 and B(lue) 1-155 (a combination of all these primary colors mixed together should in theory provide every color in the universe), and there can also be an A (RGBA) which is your alpha channel which is a number between 1 and 0 that defines your transparency (not to be confused with the 1 and 0 of gamma). The A in an RGBA image is multiplied which is why files with an embedded alpha is so large. 0 is completely off (keyed out for example) and 1 is completely opaque (completely visible) so .5 would be like a see through Item. So 87,12,90 with an alpha channel of .75 could define one single pixel and every other pixel on the screen also has its own definition and what we strive for is to get it exactly how we want and it can be tricky without knowing this info and then how to manipulate it.
Furthermore, you can see how none of these variables will affect focus. Not at all, not one bit.
There are a few ways to affect focus and they are changing focus, objects going in and out of your focal distance and leaving your plane of focus which is almost always infinite with aerial photography. We strive for sharpness rather than a more cinematic motion blurred image which may very well be the desire in which case with the Phantom your options are limited but they include things like the settings where you can change the level of blur or sharp. Then of course in post.
So anyway, I hope I've convinced you that there is nothing inherent in the d-log setting that I could imagine affecting focus other than some sort of hardware issue.