Ok, I'm starting to get worried now. Did you test another new one to make sure about the concerns you're having? Did anyone talk to you about the nature (true auto vs. automatically shifted manual) of this transmission? Did they reflash the PCM to the latest level (just to be sure?) and relearn the adaptive strategy? Did anyone do anything?
Please go to a dealership and test drive another one. If you feel there is a problem, then get the service manager or a lead tech to go for a test drive and make the car display whatever concern you are having. If it is verifiable, and to a lesser extent reproducable, then they've got to try something. I know as a tech this kinda sucks, but THAT'S WHY THEY CALL IT WORK!.
Please also feel free to call Ford's customer service division. Or maybe if you can, take it to another dealer and ask them to look at it. But first, please drive another new one to compare it.
On a technical note, yes, the adaptive strategy is pretty complicated. On your particular model, when you reflash, it has to learn a few things. It starts with a test of both clutch motors to make sure the full range of motion is attained (and i could be more technical, but I'll try not to make your eyes glaze over since you've made it this far). If that passes, it then has to relearn just how far the motor have to turn independently of each other so that the shifts from gear to gear (acutally, clutch to clutch). It measures shift lag to keep it reasonable. Then it tests the sensors for the drums speed sensors and looks at the difference. This tells the TCM that the target gear is acutally engaged. If this gear is not attained, the test fails, and the problem must be corrected (i've gotten to this point with a few of them and they fail). After this, which only takes about 1/2 hour of sitting in the car and monitoring the computer (usually while I listen to something), then you go out and drive it in a pretty specific loop.
I've droned on, but what this really means is that this car learns the way YOU drive the car, and based on shift timing (shift lag), the PCM/TCM will keep the shift lag inside of some predetermined window. This means that most techs after reflashing a module or two, usually don't take the car out to do this. And problems can be relearned completely wrong. Like if the customer come to a 'rolling stop', where the wheels never really stop, it can seem like the car lacks power, due to it never seeing stop, it never shifts back down to first. Or, on a driver demand from a low speed, the trans will appear to downshift harshly due to the downshift into first. There's are some minor remedies for these to an extent with software changes, but some of this is just the nature of the beast.