I prefer quality over quantity. Sadly, Bethesda doesn't share that view and "as much whatever as possible" is their main philosophy.
Voiced protagonist doesn't necessarily have to mean less dialogue options, HOWEVER if it's like what they've shown so far, which means dialogues being basically a 'line', not a tree with hopping up and down in levels, it will be even worse than usual. All in the name of rubbish cinematic dialogues nobody asked for.
Additionally, 4-way dialogue wheel with blips does mean less dialogue options, obviously 
Fallout games in the past didn't not have anymore dialogue options than what we've seen in the trailer.
People a wheel and that's somehow less than the good, evil, neutral and tell me about yourself we get in the previous games.
Not sure how that connection is made. We have seen 1 conversation in the game, and you're making conjectures about the dialogue that took 2 years to record based on that? You could at least wait to see a conversation with a host of NPCs before coming to an uninformed conclusion
If I were to load up NV right now, and walk up to easy Pete, my conclusion would be that dialogue system is awful, and not just because the ugly dialogue interface, but also because he doesn't say anything that branches off to more interesting topics.
It's also worth noting that having a voice at least requires dialogue to be fluid instead of me walking up to ralph from mick and Ralph's and immediately asking him how I can get into the strip, despite never meeting the guy before.
Just "hey, I want to buy a fake passport guy I've never spoken to." One speech check and bam, I'm the proud owner of contraband from the black market. No introductions made or other topics brought up.
Edited by HighestPrimate, 18 June 2015 - 06:33 PM.