i would assume an affordable option compared to a tremec, which would cost more. the cost would then be passed on to the consumer. my guess is that ford made a decision to use a Chinese made unit that meets there demands because it was the most cost effective.
the T5 and the TR3650 weren't great trannys for shift feel before, so im betting the Chinese made 6 speed isnt any worse.
it is sad that an American Icon is using Chinese parts, however without seeing future reliability i dont think its fair to condemn it just yet. it may turn out to be a well built and reliable transmission.
often the Chinese work cheap, but their Quality control is generally pretty tight and their products are decent.
10 years ago everyone thought kia/hyundai were cheap built Korean cars, however today they are just as well built and reliable as anything else that is similarly priced.