Not odd at all. you have 4 sun roof drains and 2 A/C evap drains. A/C drains come down from the cabin on each side of the tranny. Front sunroof drains come out at the bottom of the A pillars and the rear sunroof drains come out at the rear wheel wells.
I brought up this same point to the dealer when I received my 2018 SVR. They showed me several other RRS and the tube was the same length as mine. None of my previous RRS had a tube noticeable like this before, so maybe it is a design change.
The tube has to be long enough to clear the body panels when the vehicle is raised, so I figure that may be why it sticks out during normal or access height.