Perhaps not, but it's about what I would expect from a mod. I've played a billion HL/HL2 mods, many with voice acting that I would consider "decent" for a free mod. In reality, much of it would be awful if I was paying. I'd consider the small clips we have heard from Black Mesa Source to be decent for a mod, it's a bunch of dudes trying desperately to force their voice to sound like tough guys.
I think the biggest problem this team faces is people are not expecting a quality mod. They are expecting a remake of one of the greatest games of all time like it has Valve's name on it or something. People need to come to terms that no matter what it's based off of, it's still a source mod, just like Minerva was, just like Research And Development, and Nightmare House, and Mission Improbable. It's just a source mod that is trying to make a full source version of Half-Life. It's a tough task, and I didn't necessarily ask for it but I am willing to accept this "present" that is full of hardwork and see if it's good.
Some would say "Then they shouldn't have done it at all if they are not able to faithfully remake Half-Life". To that I would argue "
Why Not?"