Personal opinion: Don't expect it. For sure I'd not support slapping any of the available sound packs into the engine, unless it can be guaranteed that there is no chance of anyone making a copyright claim against 1C:Maddox Games and ultimately Daidalos. We don't have a six-digit sum ready just for that case. Do you? But that's just one aspect. Quality and the way sounds interact with the game engine are another (which I have no idea of).
And before anyone asks: I somehow doubt very much that we'd have the resources to make own recordings, unless Martin hasn't told us everything.