As newer cameras more often deal with stabilization by itself (better or worse) it is less urgent case, but for RAW material this would be also a nice feature, it is something like the correcting horizon scenario mentioned in rotation section for Hugin example (watch [[https://www.youtube.com/watch?v=hxMmZheXG5g|YouTube] tutorial for Hugin]).

Stabilization could be provided by some heuristic approach or by selecting key points on a few distant frames, so application could transform equirectangular projection of each frame so those points will be still (in same level as on base frame) on all other frames.
For more information please visit Blender stabilization solution for 360 video.

Some RAW and stitched material can be found on Google Disk.