ford is on records as saying another re design in 2020 , that also when they introduce the F150 Hybrid. There is also a re designed 2020 F250 coming out, You have to give it up to ford. They dominate the segment because they continue to push the envelope with Options/etc.
Heck they are so petty with best in class everything , they couldn't stand GM being best in class HP for Half tons, they gave the raptor motor to the limited as well.
I like this kind of competition from Ford, you can out do them anywhere you want but the truck game they wont allow
The half ton market is the most important segment to both ford and GM , so you will continue to see 2-3 nip and tucks.
Get used to it.