I am having similar results here - I import a MakeHuman character from blender, in Blender the character is scaled to 179m and when I export/import it looks fine, when scaled 0.01 - I import the character with the exiting skeleton and that goes well also. The idea is that all characters should share the same skeleton/animations…
But when I apply the shared animation BP the entire character is scaled 100. I figure that there is some correction done by the animation or that somehow the character still contains some scale parameters? I tried various options, scaling on Blender export, on UE4 import, changing the units/scale in blender… etc. nothing seems to help!