Anyway I believe that the autofocus works fine and really fast... is made for a still camera. To have a usefull autofocus for us I guess it shoud have a different behabior or "mode" when recording video.
Same thing with f steps... no point in changing aperture while recording because it "jumps" roughfully from one one value to another, not like a videocamera does.
GH54 or GH5 are still a photography camera:(
Have you seen the reports about the autofocus working considerably better if you use an external recorder?
This seems to indicate that the internal processing power is really limiting the performance.
Also, everything is much worse in 4K than 1080p. Also the manual acknowledges this fact.