Let me rephrase the question a bit for you...if you recommend a camera system based upon a sensor, then i wouldn't want a hear a recommendation from you anyways.
And answer that by saying that since the 5DII, I haven't seen a Canon camera with a sensor that was significantly better enough for me to want to buy it or recommend it to anyone.
i would look at whether or not the system fits the person, support, service, used market in the area, what they want to shoot; and recommend based upon that.
a sensor? wont' be as relevant as the above would be in 2-4 years time.
In 2-4 years time, I expect people with Sony/Nikon cameras to be taking and editing photographs that Canon people simply can't - at least not with the same level of detail and color. I fully expect Sony/Nikon cameras to have 15, if not 16, bit ADCs in 4 years time. As for the system? They'll fill that in. The vast majority of users don't need more than a handful of lenses
actually what you stated is meaningless to 90% of photographers out there. but it only works your direction?
if the vast majority don't need specialized or an excellent ecosystem, they probably don't care about the sensor or what you think is important either.
I do find used markets, support services and general availability to be far more important than the "theory" you have on where things will be in 2-4 years.
People will want something that gives them a better image than their mobile phone.
The choice is Canon, Nikon and Sony. Two of those three are now providing substantially better images.