Miyazaki doesn't like anything otaku and unsurprisingly has a negative view of a seiyuu industry as a byproduct of that hyper-animeish culture. He also doesn't like animators who only draw things from the anime. However, Anno delivered one of the most stiff performances I've heard in anime, not sure it was the best decision.
I don't think seiyuus are that limited, just look at Yakuza games and compare them with some harem anime. The problem is, the product itself is much more homogenised these days.
I think I was wrong to say that Seiyuus were limited, you are right. It's mostly that the style asked of them is really narrow and samey most of the time. Miyazaki influenced my thoughts there, sorry! It's refreshing to see some productions where the Seiyuus just go wild and I'd argue that this is why shows like Konosuba and Love is War are so successful. They feel less wooden and more natural.
As for Miyazaki, in my eyes he is an abuser and has the kind of personality and fame that causes widespread harm to those around him, I certainly don't venerate him. As far as movies go though, I think he's kind of right to look at them objectively.
I think Anno's performance was refreshing, but not exactly insanely good. He's not a professional and it shows. Anyway, I guess my reformulated point is that when Japanese VAs aren't forced into the same old peghole, they shine as the talented pros they are. But the anime style really got old for me long ago.