There is no problem with the EcoBoost. Only the Adaptive Cruise Control. The baseplate gets in the way of the radar sensors.
Mine is not EcoBoost, though I wanted that. I could not find a EcoBoost in stock with Sync 3 and without ACC. I found the EcoBoost models with Lincoln Mytouch or with Sync3 and ACC. But not EcoBoost, Sync3 and no ACC.
Your Dealer is misinformed. Talk to Lincoln.
I would not buy one without Sync3.
Go to your dealer, get him in the car and put it in Neutral Tow Mode as per the manual. That's what I had to do. I showed the salesman, then the manager and then the service manager.
My dealer had been telling people that it would not work for 6-months. My salesman called me last week to thank me, he said the official word was now that it is flat towable at their dealership. One of the largest Lincoln dealers in Texas.