Skate 3 "jumping around"

It's wrong  emulator logic.

It's shoud be fixed (didnt see that happen) in spu asmjit improvements as soon it gets some fixes and merge to master build.
+
fixed slowmode and falling object under the map.

I went ahead and downloaded the latest build from the Build History.  I used the SPU ASMJIT like you said, but it made no difference.  The version was 0.0.3-6037.  The game was very laggy, not smooth like it was in your video.