Amin
The lack of sharpness (for want of a better phrase) that you are seeing when viewing at 100% perhaps relates to a point I was making in an earlier thread about 'lack of bite’ in the A7r II files.
I am not an engineer (I’m often amazed at the scientific knowledge displayed by contributors on this site) but, in my opinion, this softness might be a result of the small pixel size used to achieve such high resolutions in a camera such as the A7r II; without wishing to harp on about MF (I’m well aware that the A7r II and my MFDB are totally different animals), a difference I see in the images from my 39MP P45+ back, and 60MP P65+ backs that I have hired, is that, even though they are very high resolution, they still look absolutely tack sharp at 100% view on screen, which I guess could be down to the larger pixels.
Personally, I’m not sure that increasing the sharpening in C1 Pro is the answer as I found that the A7r II files started to ‘fall apart’ with not much more sharpening than the default values; I generally find that Phase does a pretty good job with their default sharpening values for most cameras and rarely feel the need to change them for my P45+ back or my Canons. You could try adding a bit of ‘Structure’, say an amount of 10-15, but I wouldn’t use this for portraits of people due to the effect it can have on skin texture.
Perhaps this ‘softness’ when viewing images at 100% is just something we have to get accustomed to when pixel peeping images from sensors that have small pixels and realise that, at normal sizes, whether on screen or in print, the images will still appear very sharp and detailed. Maybe one of the reasons that I felt a little underwhelmed when viewing the early images of the A7r II is that I’m not used to seeing this ‘softness’ when pixel-peeping: both my MFDB and much lower resolution Canon cameras (5D II & 6D) all have larger pixels than the A7r II and images from all of these show apparent sharpness at 100% on screen. In spite of this, I’m certain that images from the A7r II would look sharper than my much lower resolution Canons if printed at similar sizes…
Anyway, just a few personal thoughts on the matter.
Best
Liam