BF1 doesn't have the tag input option so members are changing their name in Origin Profile to eGO_Name or eGOName. Now in BF4 it will look doubled as you have the clan tag on [eGO] eGO_Name. I have just let both on since I go between games. You can drop the clan tag in bf4 but that's not recommended so players know your an admin. You can leave them both on. You could not add it to Bf1 and hope for a clan tag system to be put in place.