Improve the off-road drive-ability across the terrain mesh. You said it was too low currently. Perhaps if the actual collision mesh tightened around a player or vehicle.
That was before, in the first video with Tatra where tires were occasionally seen "flying" - the resolution was >1m then, now it's ~0.15m
I have one request. Most games don't show your own player model. If you look at your feet you see nothing. ArmA does show your model and looking down results in seeing your feet and arms and the camera's viewpoint is the eye. If that could be enabled in this engine. It would be a great improvement.
Unexpected things happen with that. You know, we actually have a model there when moving with FPS controller (somewhere you can see a shadow of the man), and we also have the logarithmic z-buffer that gives unprecedented depth resolution and allows to position the near camera clipping plane really close.
So what happened when looking down at boots? Since camera isn't stereoscopic, it's positioned between the eyes. So we saw .. a big, really enormous nose taking most of the screen
And the sight was so unexpected that it took time to even realize what it was. The first words were like, OMG what is this whale doing here ..