Hm, I thought I had posted something before but ...
Anyway, there is no other way to rename Comback Kid but through English.txt (or French.txt, German.txt, or how ever the localizations are named).
Talents and abilities 'bypass' the 'translated string key system' and have the handles for their displayed strings stored directly inside the .exe.
English.txt is the ultimate file for all displayed strings. Only if a created object or a translated string key does NOT have a handle, it's value is displayed directly. So talent names are only changeable the way you already did, through modifying English.xml.
I know it sucks to not be able to pack this file into a Steam Workshop .pak and you have to provide it as an extra external resource but you already have this problem with Requirements.txt, because you must place it outside of the directories the editor considers for a .pak file.
Larian might do another patch for the EE eventually but I'm pretty sure they will not do any more changes for modders.
They will always point to D:OS2 and hopefully the modding situation and support there will be better.
