Some nice examples right there Andrew. Thanks for sharing.
It's like you read my mind mate. I was looking at the GX85/GX80 (why must they make it confusing!) as suggested by
@MoonMind and seems the most likely pairing to make the camera 'pocketable' is the 12-32mm. This combo beefs up the GX combo to proportions comparable to the LX100. The IQ doesn't seem too shabby, nor do the ergonomics. Admittedly the speed is an issue - having slowed down to f4.5 very fast, but you are spot-on - most landscape would be stopped down in order to get what you want in frame sharp. However, the lenses versatility starts to diminish somewhat when you need it for something other than landscapes on a fine day and the slow aperture starts restricting what you can do indoors. This really is testimony to the feat of engineering of compacts like the LX100. Granted we're not using the whole 4/3 sensor here but even taking equivalency into account the f1.8-2.8 across the 24-75 range for something of this size is astounding. The 12-32 comes close in size but in speed - oh my!
And whether we are talking Olympus or Panasonic, this is where the slope starts to become slippery. Body sizes seem very reasonable on spec, but then add the lens you desire - for me something like the 12 and 25 f1.8s - and all of a sudden things start to bloat. Not a complaint about their direction - these guys are coming closest to the vision of Oscar Barnack all those years ago - but more that you start looking for that compact camera, then you move to a compact camera and lens, then in minutes you arrive at a system.
BTW: I'm not much into video, so the differences of EM5 and PEN don't much come into play. The great decider if I went down the system route would be IQ, UI and that darn VF - with regards to the latter this I want the best I can.