Then perhaps you shouldn't have listened to it, because personally I think it's silly to jump to conclusions about how much it will suck based on a lower quality recording and before any potential further work has been done with it.
If it's that it doesn't fit the preferred accent you would have hoped for, that's fair enough. If you are open to the possibility it could sound better when you get a much better listen of it later on, that would be more reasonable.
It's kind of tiring seeing just about everything being *****ed about to such an extent. Of course you're entitled to your opinions, but it doesn't make the most sense to me that these opinions (specifically any of the fully negative conclusions drawn) are primarily based off of spoiler, unofficial-quality material.
We're lucky to be getting a glimpse at these things, hearing these recordings, and then there are people who complain about what they have spoiled for themselves because it's not good enough - even though it isn't the finished product.
Perhaps I am one of very few that thinks there is a good possibility the finished product will sound awesome, understanding that we can't get the best idea from this clip, yet appreciating the direction they seem to be taking based on not only what could be heard but the details others actually present brought to us.