I will vote for YES!

why? because sometimes spech is needed even in FP-S games like narrator's voice, online helper's voice, tutorial's voice or something and of'course RPG with dialogues.

If this will save memory and increase fps... why not?!?! Even if I don't need it right now, but when my game will be in final touch it will be usefull.
It's like a terrain generator.... some people need it someone not, becouse they are making space shooter, but it should be added

I hope You undarstand my Polish-English middle Atlantic language