Newsflash for Leica, from Jack's "Binniss" and Marketing 101 class:
1) Arrogance does not sell well internationally, and this is especially true in the US market.
2) If you're going to make something new, don't reinvent the wheel. Instead use an existing lensmount and corresponding IC. (And at this point, I sincerely don't care whether they chose Hassy H or Mamiya M, one of the two current top sellers.) Even if you think the price to do so is too high, you've immediately expanded your potential lens market by some significant factor, and moreover, allowed your tweener, hybrid camera body concept to become a viable back-up or second to another working brand -- so have additionally expanded its potential market! (I submit this may be one reason why the Leica M remains so successful aside from its shortcomings...)
2a) Corolarry food for thought: IF Leica had opted for say the Mamiya lensmount, I personally would probably already own at least an S2 body. And if the 70 and 35 were good, I would likely own them as well. You see, I could justify the cost and the shortcomings as long as it added flexibility to my total MF system.
3) History shows over and over again that totally closed technical systems rarely survive.
Okay, maybe that's all too logical.