But what I can confirm already: the dark color startup bug that has been reported and not fixed yet, seems to have gone with this test kernel.
Just to make sure, I did as advised (after that the bug was gone for me after every reboot):
wget "https://www.dropbox.com/s/jjt87mtlyxic3l1/vero364-image-3.14.29-25-osmc.deb?dl=1" -O vero3-image.deb
wget "https://www.dropbox.com/s/bpyaqkr3azx5nsc/vero3-mediacenter-osmc.deb?dl=1" -O vero3-mediacenter-osmc.deb
sudo dpkg -i vero3-image.deb
sudo dpkg -i vero3-mediacenter-osmc.deb
sudo reboot
sudo chown osmc:osmc /sys/class/amhdmitx/amhdmitx0/frac_rate_policy