True... but what I'm wondering about is whether there will be anything automatic, since the physics could cause some very odd results without automatic action taken. Something like this: Imagine the brown is the bear and the red is the armor... (front view)
As you can see, the armor would be forced up and off the bear, and when it moves the armor would flop around helplessly on top, looking very very odd...
If the editor is like the GalCiv editor, one could manually edit each peice on... But that would be a very long and painful process, since over the course of a short game, I would imagine the player would need to adjust armor on 10-20 units if they were into modding... Looking at that horse, the armor each unit has is around 5 peices (and thats just for mounts, infantry and the riders of the cavalry would likely use upwards of 10-20 peices) which would result in a large amount of work to fit a modded unit into your game, even more if you consider you will need to redo the armor scaling for each and every upgrade done. A GalCiv system would work, but would likely require quite a bit of work on the player side to make armor fit their modded units.