I also think that English voice acting is generally great. Well, English voice acting post-2000, anyway. Don't get why peeps complain about it. The Japanese is not superior. Is it worse? Not really, but it sure isn't better (usually).
Well...I dunno about that. Whether it's better or worse is subjective, of course, but I think most people would say that the Japanese acting is usually better as a whole. Well, most people that legitimately take English voice acting into consideration. Quality-wise the Japanese track is generally better, largely because there are more people in the business and the voice training is...well, there, so things such as emotion and casual speech often come out more fluidly. Many English VAs don't go through voice training, and those that do often take less involved courses, often getting better as they go along.
For instance, take Erin Fitzgerald as an example. She played as Alkaid in the .Hack//G.U. games, and when she did, it was like grinding against my ears. She overdid the tomboy act and her lines were painfully drawn out, often contrasting with the characters own animations and mannerisms. As a result, when I found out that she was playing Chie in Persona 4 Arena (and later Golden), who is somewhat similar to Alkaid, I was worried that she would be the black sheep in a sea of good voices and that I'd end up disliking Chie as a result, and when I first heard her, I didn't like her. But then I played Golden, and found that she not only grew as an actress, but she also learned to conform to her given role, and I very quickly came to appreciate her. This was the result of the many other jobs she had since G.U.
So while they may initially be "experienced", what I find most interesting about English voice actors is the passion behind them. Dub VAs often have these drives, calling back to childhood memories or seeing characters that they wanted to be, and in a way becoming them. They put themselves into the role because they
want to put themselves into the role, and you can feel the passion coming from them when they interact with fans and...well, when they voice act. It inherently makes them better VAs than if they just didn't care, and I think that's pretty darn admirable.