I'm one of the weird guys who prefers English voices so I am waiting lol.
I think BassForever is saying that if you don't really ever watch dubs because you prefer Japanese voices, commenting on particular voice actors or performances is a little open to question because of more unfamiliarity with that actor or their past performances.
Underlined is the assumption being made of course, and not necessarily true.
I'm probably late on saying this, but the Japanese voices are just too darn good in this one. I've watched English- and Japanese-voiced anime, and the range of emotion that the seiyuu have to show here is crazy. From the very first episode.