It would be fun if voice were using... Well they spoke in a certain way in the medieval, for example instead of you "thee" and so forth. Dunno what to call it

But would be fun if also the voice commands was reflecting the period of time both use of words but also the use of swear words, for example i believe there wasnt anything called "hell" or "fuck you" the words and phrases was just not in the vocabulary back then.
OR it could be inspired by the warband singleplayer voice sets, for example the way the looters speak

edit:
(Snowballeffect) And you could add different voice sets people could select based on what character they played, for example, Kapikulu had turk accent, Nords had crappy Scandinavian accent and so forth. Or simply based it on what type of players build in the char-builder (some simple algo that looks at hair/eye/skin color selection)
btw QAA doesnt work (anymore) it worked previous with the fin-soundpack. I guess there isnt any current voice for the command? I hope its just a typo in the code or something so its there but just bugged :p