I do understand the sentiment - you just want the game and if it means sacrificing voice to have it delivered, so be it.
But realistically, there's no way that Telltale will omit voices.
But if it costs too much (cuz they'll be probably need more than for a game like Texas Hold-Em)
Yes, but they obviously have a much bigger production and marketing budget (and sales target) for BONE that Hold'em. And if they can afford voice actors for a little 'trial game' like Hold'em, of course they can afford voice actors for their first big licensed product.