ERRATA:
Ignore the bit where I said it has 4mp more compared to my GH2. I didn't overlooked the fact that the GH2 has a multi-aspect sensor.
Regarding dynamic range, the metering might be different from my other cameras, or perhaps something in the imaging chain that produces the raw file. I say this because, while it seems like there's isn't as much highlight headroom for recovering details, I don't seem to need to do that as much, anyway. What I've typically seen is that if I've recovering highlight details, I just about run out of room on the slider control before I reach my desired look. In comparison, with my D300 and RX100 II, I usually had a bit more room left. So, just to be clear, I'm not sure if this is an issue or not. So far, it hasn't been an issue. It's just an observation I'm making.
ADDENDUM:
PRICE
It's not a cheap camera by any means. Some may find it over priced, and maybe it is. It depends on what features you value.
If you're pricing based on image quality alone, well, I think any m43 camera beyond the mid-range model line up, if that, is over priced. Better to look at the budget APS-C DSLRs.
Even if you want to stay with m43, there are cheaper bodies that will produce identical or very similar images for less money.
The GX7 is worth the money IF you value its ergonomics and particular combination of features (features BESIDES image quality).
Good arguments can be made for the EM-1 and the EM-5 as well. I came close to buying those cameras as well. What it came down to is that the GX7 checked more boxes for me than the Olympus cameras did. I guess my main point is that you're considering any m43 with the latest sensor, you shouldn't be making your buying decision based on image quality because they're all very close (based on what I've read). It's the other features that should be the deciding factors. If you ONLY care about image quality, then definitely get the cheapest body you can that has the current sensor tech, otherwise you're paying too much.