I'm not sure getting a big actor to do Eisenhorn's voice is a good thing.
PixelHero is a relatively small game company, I can't imagine they have a massive budget to make this title. If they're blowing it on one big voice actor... I'm not sure it's a great way to spend money. Surely it's better to spend that on Developers?
It might seem like having a decent voice actor would sell the game, but I'm not sure it will for a niche game like this.
On the plus side, at least they're taking voice acting seriously, as it can make a difference. Maybe just not this good.
Bear in mind, I'm not a games developer, not have I worked in a games development company, so I've nothing to back this up.