I don't think it is sour grapes, he pains to point out that he wants to like the camera since he is a long time M user. But side by side with his canon's and older M's the issues he raises are pretty solid.
I think the main point is here is a working photojournalist and conflict photographer, the kind of shooter that is Leica's home team, and he points out that the M8 and the M7 don't measure up in reliability or usability terms in comparison to either their forbearers or the current crop of dslr's.
I don't agree with everything he says in terms of IQ, but on all the other points it is hard to dispute, stuff we have heard before. My only wish is that Leica do something very different for them and evolve this camera quickly like any other manufacturer would do, incorporate the lessons learned. I have no problems with the price issue, you pay to play and if this is what you want to use, the money issue is not the primary issue. An M8-II with a host of improvements, eg: lower noise, faster electronics, recessed buttons, scroll wheel ev comp, more secure release/on/off, no bottom plate removal, accurate framelines, viewfinder shutter speeds, etc etc would be an improvement even at the existing 10mp resolution.
There is no reason not to do this except for the fact that Leica is too loyal to the old market that tries to maintain value in old equipment-this is basically what is killing them now. The value is in the lenses, and the body itself now has less value. The upgrade plan is not a good idea, they should focus (imo) on getting an improved body out the door quickly and let the resale market find it's own equilibrium.
Anyway this is an old saw.