Personally, I need to see some well-paced dialogue scenes without snappy trailer editing at least before I form a final opinion on the English voice work, but nothing about it sounds BAD. It's not like we're dealing with PS1/PS2-era voice acting here.
I will say this, in some instances, yes - there is some really rough dialogue pacing. Advent Children had it in spade, but I haven't seen that here. It's been nothing but solid voice work. We have yet to see a full scene play out in the remake.