Something I have noticed in watching the videos online, it seems like there are too few voices for units and the same lines are repeated to the verge of insanity. Do recent builds have more voices for units? Or perhaps could other sounds (engine noise or something) be dispersed amongst the voice acknowledgments so that you don't hear "how sinister" every third click? It reminds me of Pacific Storm (which had 1 or 2 acknowledgments tops so you constantly heard the same line).
This element is one that really reminds me that the game is ultimately an RTS.