I think having a unibody Ridgeline-like vehicle makes perfect sense. Toyota does something similar in their SUVs, overlap two vehicles of similar size targeted at slightly different markets with the 4Runner and Highlander as well as the Sequoia and Land Cruiser (although less distinctly since the big trucks are body-on-frame and share some parts).
My point would be Ford could easily target a Ranger for people who want a truck for utility and more off road and another for people who need 4WD for snowy roads. Those people don't benefit as much from a ladder frame or transfer case. A lot of complaints of Tacomas when compared to a Ridgeline as the ride and height. I think it's unfair to lump them into the same class just because they have an open bed and are similarly sized. They aren't really that similar otherwise.
I'd absolutely love Toyota to see the light and offer a Hilux and Tacoma side-by-side. One no frills, the other with Tech Packages and sunroofs. The next logical step for the Tacoma is independent rear suspension after all, right
@Clutch?