I have been shooting with the T for several months with both the 23mm and the 18-56mm and I would say that I think that they have done a great job with the T. The user interface, I think is key. There is a great video online called "How to handle the collapsing camera market" and I think the business consultant hit the nail on the head WRT the changing expectation of the user interface with regards to technology being the driving force in the collapse of the camera market. I think Leica got the message early and made the "right" camera for the future.
As for the T slowing shooting down and only being good for static subjects, I would disagree. If you rely on AF yes it can be challenging with about 1/2s delay but being a good photographer means that you should learn how to use your tool. Much of the trick is just like on the M system:
1) when you can manage it use a wide aperture and zone focus, then compose appropriately for the deeper depth of field.
2) Or when you have moving subjects, pre-focus the camera and then click the shutter at the decisive moment.
If you have the exposure set and focus locked, then the camera just releases the shutter practically instantly.