Yeah we have used all those tricks as well.
However with a recent project I forced myself to accept that the best solution was to rotate character base rigs in object mode.
We even experimented with adding an extra root parent.
But the object mode solution worked the best overall.
In this project I also use the same technique for the camera rig.
But trust me when I say this is an extreme edge case and would have little use for most people/situations.
But I don’t see you addon as having anything to do with the overall problem of translating
characters through space at the object level.
I will buy it today and start testing as we have time.
It might be useful for us in this aspects of this edge case problem as a slightly more elegant solution.
Sorry too complex to explain more…
I will maybe make a post about this in particular.