Use FBI to copy the extra data folder into the extra save data section for fates on FBI's main menu
Delete extra data for fates, open it (and thus recreate data) but leave the game before things are written. Then a folder is created in FBI>extra save data>FE Fates. copy contents there
Characters are not gaining exp when fighting, amiibo characters are not gained automatically from the mod.
When amiibo characters are recruited, they to do not gain exp, and are stuck at level 15