On the surface, those requirements read like the spec sheet of the G1X mk II. Are you sure that's not number one on your list, and this is just a last ditch attempt to see if anyone can talk you out of it?
I'd say go for it!
LOL - well, I am not a gear slut per say, as aside the lumix, I only had a brief romance with Pentax 30 years ago or so (ME-super II). The LX3 did fit the bill when I lost a canon S9?? series a few years ago. It's unusable at 800 iso and higher, not to talk about color rendition. The size was right, with plenty of control, good close-up/macro abilities, and got it cheap enough to not be afraid of carrying it up and down mountains.
What I don't like on the G1-X mk2? - in part the lack of viewfinder and for sure the very short battery life.
It's not that the G15, G16 or G1-x are out of question, but the possibility of using my current lenses it's a big draw, IF indeed the AF can work. In that case so far, Sony is ahead. $400 for the metabones places it above what I want to spend for a casual camera (my wife has the S120, but would not be enough for me).
Then comes the Rx100II - did not like the UI that much aside offering only 28mm wide.
Has to be with a zoom for sure, and no less than 24mm.
I guess I will keep a look on same of the new upcoming models, but still wishing in big part that an EOS M mk3 would show up mid-summer.
So, nah, Canon G1Xmk2 still not quite there, because there is so much competition on that price and capabilities range right now, but they are just released or about to - aka no real feedback/reviews available yet
meanwhile I have a dedicated IE favorites folder with 20 links or so ....