2014 Ford Escape 2.0 Ecoboost 4WD - Vibration On Load

56k miles, always maintained on time by Ford dealership, and i've owned it
since 2015.
A few weeks ago the symptoms that i've listed below started.
So far the dealership has replaced the rear motor mount and a cv shaft, but
this hasn't solved the problem.
It's going back to Ford for more tests tomorrow.

Here are the symptoms as best as I can tell;
1. The judder sensation is felt in the steering wheel and gas pedal.
2. It starts when gently accelerating beyond 50mph and fades away at
around 80mph.
3. The vibration is present between those speeds if gently acceleration or
holding speed.
4. At around 65mph a barely audible low-pitch "thrumthrumthrum" pulsing
sound starts.
5. All symptoms seem to get slightly worse if the highway is curving to the
right.
6. If you're accelerating hard, the symptoms do not appear to happen.
7. The vibration and pulsing sound disappear immediately if you lift off the
gas pedal, every time.

I'm seeing similar issues posted by other owners online, but i've yet to see
anyone offer up a consistent resolution.
Any ideas folks? I'd love to be able to offer some suggestions to the Ford
service guys tomorrow.