I travel a lot, writing this while on a 3 week trip. Own a GM1, my default carry, a GX9, an EP7 and 2 RX100’s that are my dedicated travel cams.
My thoughts:
The RX100's are a joy for travel. They take days, if not weeks, to set up but once that’s done you never have to visit the menu's. Wrap in gun grip tape, mount an adhesive grip and they’re fine in hand. They don’t come cheap and I’m careful with them.
GM1: no CAF, no IBIS, no EVF when the sun is not cooperative. Poor grip with larger lenses. My defaults are the PL15, P20 and G Vario 14-42. Not as delicate as the RX100's, less flexible, I've never travelled with mine as flexibility and adaptability is important during travel.
EP7: Great IBIS, great image pipeline, terrible control set. Forget it for travel.
If you want to stay in the m43 world, I’d strongly suggest a GX80/85. They’re not much larger, rugged, very easy to use, good/flexible control set and OK IBIS with primes, better with Penny coupled zooms.