Those are just tools. Just because it's the latest UE, doesn't mean graphics will have cutting edge fidelity. Though CGI teaser probably hints at Sony's deep pockets.
I'm an old school gamer who played and enjoyed games with a silent protagonist. So I personally prefer no voice. Like classic CRPGs Fallout 1-2, Baldur's Gate 1-3, Arcanum etc... Better for roleplay, since I can imagine the voice myself instead of listening to something predefined, which may not fit with my idea of what kind of a character I'm playing.
If the budget is big enough, they will most likely voice the protag. But it will be just one male voice and one female. Similar to Mass Effect, Cyberpunk etc. More than one is too costly probably.
I'm more worried about what they will do to the battle system. Bigger budget might influence them to go for flashy action to score better sales instead of something less mass-appealing, tactical.