I have one of these cameras having bought one a couple of weeks ago. I kind of agree with many of your comments about the limitations and share your frustrations about the controls.
However the fact is that I now have a camera that is capable of producing images comparable to my DSLR and it fits in my pocket.
Sure, the DP-2 will be better, but for sheer picture quality I have not seen images produced from a compact camera that come anywhere near the DP-1, not even the £500 Leica D-Lux 3 it replaced.
The main thing you failed to mention in your review is Depth of Field. Due to it's large sensor we finally have a compact camera which has properly controllable depth of field.
I agree it is not a joy to use, but I'm getting used to it's quirky controls and I feel it is set to be a classic.