NHTSA Complaint #11561014 — 2016 FORD EDGE

My 2016 Ford Edge with 86k miles encountered a well-known EcoBoost engine problem (TSB 22-2229) where there was coolant intrusion into the cylinder causing a rough start and codes P0302 (cylinder #2 misfire) and P1316 (misfire in first 1000 RPM). My understanding is that this problem can potentially lead to an engine fire. The dealership I bought the Edge from replaced the engine block at my expense, not because the block itself was damaged, but because the newer block doesn't cause the head gasket failure or leakage between the coolant system and the cylinders. I requested a buyback from Ford but it was denied with no explanation given other than the list of general criteria for denial. It would appear based on those general criteria that it was probably denied because the vehicle is out of warranty, I encountered problem after warranty expiration/18k miles, and only one repair job (replacing the engine) appears to have repaired it. But it is clearly a defective engine - only question is how long Ford has known about it. I requested just a refund of the repair cost (engine replacement), but that was also denied. Ford customer care said they would give me an extended warranty as a "goodwill gesture" but this does not cover the sunk cost of the engine replacement and they could not promise me it would cover this same problem if it occurred again.