FUJI X-H1 - Aperture Flickering and AF-S preview issues

"So, as for someone else in various posts, I've received the "official" answer and this behavior is "normal", less visibile and more fluid on newer models but there." I know nothing is broken but frankly it's annoying, I have the diaphgram with some lenses noiser than X-H1 mech. shutter, expecially when you leave the shutter button in AF-S or in contrasty scene. Not considering also the absence of smooth transition, because the camera try do gives you a balanced view, and to do it uses the iris itself but.. XF lenses are not smooth speaking of aperture. Sometimes I can see it goes "up and down" and the aperture preview fight with the change in shutter speed, there is no priority in this.. where maybe the optimal view may be adjusted right only the proper shutter speed is achieved, like in MF mode when changing the light source. It's very visibile on strong light difference, but also while doing some street or landscape you can clearly see that flickering after depressing the shutter or when you try to catch the focus more than one more time. On other competitors it doesn't happen also because, expecially on Lumix, iris is fluid and you get a very smooth preview almost in every situation.
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Two solutions for me:

- menu settings to manage the type of Live preview via FW update, not only for manual exposure more (also DoF)

- XF lenses with a fluid diaphgram, but I can't find one at the moment iirc
(newer 27 and 10-24 seems to have same "behavior")
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I don't know, to me it's a "problem" able to affect the shooting experience.