We have yet to transcribe the interview but we can now publish the photos that we took of them and the new elements.
Hopefully you will be able to glean some fresh information from them.
The combination of more powerful motors and the size of the Liebherr has necessitated the introduction of several new pieces that can cope with the increased torque.
In particular, the old universal joint has been replaced with a much sturdier version which can be seen in the bottom of this picture.
The light grey half with ball on the end is also used in conjunction with a new wheel bearing containing planetary gears used in the 4x4.
The new 28t gear is also shown here.
The existing clutch gear, used to prevent damage to motors should mechanisms stall was also found to be totally inadequate when used with the new Powered Up components so a new two part assembly will replace it where needed.
There are teeth on the inside of the white piece that mate with spring-loaded teeth on the dark grey piece. If the white half stalls the spring-loaded teeth will slip and allow the dark grey half to continue to rotate, thus preventing damage to the motor.
A new bucket has been produced which is, of course, modelled on that on the real vehicle.
A new, longer, linear actuator, was also needed.
42100 Liebherr R 9800
The Liebherr was designed by Markus Kossmann.
It was difficult to get decent photos of the model, but hopefully these will reveal some new details.
The vehicle contains two Control+ hubs and seven motors. I believe 3 are used for the tracks and rotating the body which are controlled from a hub built into the chassis, and four are used for controlling the boom and bucket which are connected to the second hub at the back of the body.
The pipework is all for show: there are no pneumatics. Looks cool, though.
Underneath you can see one Control+ hub inbetween the tracks, and the second one at the back of the crane body, under Markus' hand.
The two motors driving the tracks and several of the new cable-clip element can also be seen here.
42099 4x4 X-Treme Off-Roader
This is an awesome model, but one that was overshadowed by the Liebherr in the interview so I didn't pay as much attention to it as I should have.
This is the Control+ app for the 4x4. The Control+ hub feeds back a lot of information which is displayed here: rpm, and angle ot tilt of two axis.
Andres at Zusammengebaut has published more pictures of the models and parts and also this excellent interview in which both models, the app, and the parts are discussed and demonstrated.