Can't say I can agree, coming from someone that does a lot of canyon running and low level flying, the sense of speed is spot on. It ain't low level flying if the prox warning is not flashing.
This is a 20 sec clip from one of my flights last night, nowhere near as low as I normally fly (usually fly the IEagle) still gives you an idea.
I don't see any problem in the vid, the sense of speed (especially in VR) feels correct. Am at 100ft in the video, normally down to around 30ft in the Eagle.
https://youtu.be/MtzVEAxU6pE
Without VR, the sense of dimensions and distances is highly diminished. The only way to grasp speed / size is by visual comparison between objects of difference size, and our perception of the size of such objects.
The "problem" when playing on a monitor, is that everything in the game is huge. Mountains are huge, plains are huge, rocks are huge, hills are huge, craters are huge, starports, stations, settlements, everything is gigantic. And because of everything being huge, then (on a 2D perspective) nothing seems huge. For instance when we approach one of those larger planetary ports, even at full speed things seem "slow" because the tower is 2 km high, and the starport is g enormous.
The sense of speed (without VR) is directly related to how we see things on the ground (or in space) moving (well it us that are moving but you get the point). But as nearly all the things in the game are enormous, they "move" very slowly, even when the palyer is flying at full speed. And so speed seems to be much slower than it really is.
If there were smaller objects on the ground, the sense of speed would be much higher, and we could see those smaller objects "moving" much faster.
If we get space legs one day, it will help tremendously with grasping the actual sizes of things, beginning with our own ships that appear (in 2D) to be far, far smaller than they actually are.