Update time!
I just uploaded a new mesa-git package to unstable branch. And this is huge!
Because this update actually enabled Panfrost support on the G31/G52 boards. This includes my Odroid N2.
So I now have GPU acceleration on my Odroid, which has made Element really smooth. So that issue is no longer present.
Plasma however does not really support it yet. Meaning it crashes Kwin/Plasma on login if I enable 3d acceleration in Plasma. But if I use software rendering in Plasma, the apps still seem to be using panfrost, which is great. 