G85 is not a new model anyway, but as it still has a lot of features/capability very close to its successor, and in the light of the current cost advantage over its successor (very similar to the GX85 when GX9 was launched), I suppose there might still have certain interest on it. I wish this might give some idea on how this camera will perform on day to day real life shooting by an amateur.
An early feeling on this camera was at: https://www.dpreview.com/forums/post/63025800 comparing with GX85, certain early feeling over it as well as how I had primarily set it up.
Have just finished my examination on the first batch of field testing of this camera and IMHO:
M-shutter is really very good, improved from GX85 and much better than all older Pannys I used (GX1, GX7). I could find softness when shooting 14-140 f/3.5-5.6 on m-shutter of GX85 (might be because of shutter shock), the problem should have been eliminated completely on G85. The EFCS of G85 which can support upto 1/2000" is of course an improvement over GX85, but as per the solid performance of the m-shutter, it has no need to put into serious use yet.
Sharpness is in line with my expectation on GX85 because of getting rid of the AA filter. Quite noticeable sharper SOOC jpg than GX7. Moire has yet to be seen since GX85, so as on G85. Might be I am more tolerance than those who prefer AA filter sensor.
Highlight overblown vs zebra (105%) test suggested that there is likely a room of around 2/3ev ~ 1ev (from the setting at the edge of no zebra) before highlight area having zebra covered will actually overblown.
The 1st of the followings consequence was taken on the edge of zebra appeared, +1/3ev every shot after it until the shot that highlight alert actually blinks on review. Posted the 1st shot (no zebra at all), the last but one (+1ev from the first shot of the sequence which has no highlight alert on in-camera playback) and the last (+1.33ev and has highlight alert appears on in-camera playback):
#1 No zebra
#4 of the sequence, +1ev from #1, no highlight alert on in-camera playback
#5 of the sequence, +1.33ev from #1, highlight alert on in-camera playback
I still prefer the vivid mode (all parameters at default including NR=0) for non portrait shots, have iDynamic and iResolution at standard.
Highlight/Shadow been as interest to use as that of GX85.
However, the in-camera HDR should better use with tripod because its auto alignment has not much improvement from GX85.
A few samples from the field testing (not for contest of any kind please):
High/Shadow (similar to GX7/85):
Right: used a custom H/S of -2 (highlight), +4 (shadow), similar to a HDR flaterning effect by single shot
In-camera HDR (3 shots of 1ev per step) handheld (a failure on auto alignment IMHO, similar to that of GX7 or GX85):
It was a sunny, basically no wind at all, very soft output
A single shot of the above:

Normal shootings:
12-35 f/2.8 @17mm, A, 1/320", f/5.6, -0.66ev, ISO 200, m-shutter
Some miracle performance (to me) from 45-200 wide open on that day:
45-200 @200mm, A, 1/1000", f/6.3, 0ev, ISO 200, m-shutter
45-200 @136mm, A, 1/640", f/6.3, -0.66ev, ISO 200, m-shutter
Basically shutter shock on m-shutter of 14-140 be eliminated on G85:
14-140 @140mm, A, 1/640", f/5.6, ISO 200, m-shutter
14-140 @140mm, A, 1/800", f/5.6, -1ev, ISO 200, m-shutter
14-140 @140mm, A, 1/320", f/5.6, ISO400, m-shutter
14-140 @46mm, A, 1/100", f/4.9, -1.33ev, ISO 500, m-shutter
Interestingly G85 on ISO 2000 is not that bad (it could be better on more careful exposure setting):
14-140 @140mm, A, 1/320", f/5.6, +1.66ev, ISO 2000, m-shutter
Also found CAF on 4K video is very usable, will post a sample later.
Quite happy with this camera until now. Thank you for reading.