Having just had the camera one day but first impressions are super positive! I walk away from a G5 that I've had in two years. The camera controls have been reworked a lot since the G5, but you will learn quickly with use, despite this. I'm waiting for the delivery of an SD card UH-II standard. Then I can test the real news in this camera, ie 4k and 4k photo, which looks very exciting.
The camera is slightly larger than the G5, but this is marginal, given that it is still "microscopic" in conjunction with other systems, cameras built with this "layout". Yes, MFT sensors are not quite as sharp as the APS-C but only the most discerning hobbyist will notice it. For me, the strength of this camera that can take great photos in most of the relationship and that you do not need a sports bag that Konka around a camera plus a pair of lenses. Together with the price difference between MFT cameras and APS-C cameras, this is a "no brainer" for me.
If you have not determined about which way to go, look closely at the G7 (or an earlier version G3, G5, G6 is not just bad!).