Re: 2015 Ford Ranger Facelift spy photo
Ford product managers have previously stated they don't see a market here for the Ranger (but maybe a smaller crossover-based truck). If their attitude changes than they would need significantly more time to redesign the T6 Ranger for the US market (as GM did with its trucks) and build them in the US. Chevy Silverado is also grabbing allot of marketshare from the void created by F-150 which is partially contributing to their growth so you can't look at the truck market right now until F-150 is in full swing.
You also have to remember that Ranger is diesel only, smaller than the competition, and much heavier. They basically need to start from scratch to be competitive, or settle for being a bit player with what they have in the US market. Doesn't seem worth it to me unless they can be the best at it, Trucks are everything to Ford.
In any case, I think it's abundantly clear that Ford has no plans for Ranger in the US and has a different map for it's truck lineup, and probably for good reason since they understand this market better than most.