The moving of production of an iteration of engine from one plant to another... how does that "speak volumes"? What does it say?
You used a strong verb for the move... "dumped"... which is a somewhat sensationalizing way to describe what could be just a plant realignment for production efficiency. Are you seeing this move as something more than that?
On a different note... 2019 will be a very special year for RAM's new incarnation of the HD series with the Cummins engine. It will mark the 30th anniversary since Dodge and Cummins redefined the industry with the introduction of the 5.9L B Series turbo Diesel in Dodge pick up trucks.
I expect the timing of this milestone is not lost on the product planners who are busy working on the 2019 HD Rams right now.