#1 overriding reason I could not by the Fiesta, which I otherwise would have is that Ford does not allow snow chains/cables even with the standard tires. California law requires chains in the mountain snow area where I live.
Domestic brand, especially compacts, often end up in rental fleets, hurting resale values. Ford also has a history of "orphan" European models.
First year production at a newly retooled Mexican plant makes it an unknown, but first year models tend to have more problems.
Worst in class rear seat leg and hip room. Rear seats do not fold flat.