Hashirama and Tobirama's voices were utter trash, and when Madara and Hashirama were yelling at the end of the episode in which Sasuke questions the Kage, it was horrible.
Madara's yell was a joke in comparison to the emotion in his sub's counterpart.
They replaced Obito's original voice actor for some idiot trying to make a raspy voice. I actually liked his more smooth and calm voice which matched his calm demeanor throughout the episodes after he was unmasked, but no, they had to listen to butthurt fans that wanted Obito to sound like he had something caught in his throat.
The English dub has potential, but the voice actors seem lazy. The sub actors seem to be putting their all into it, and it's bad enough that the MC's voice sounds terrible in the new dub episodes, but that's my opinion.