Not that interesting at all.
1- Everyone spoke English.
Not true. Sebulba spoke Alien,and so did Watto on occasion. I don't agree with this guys argument that reading subtitles all the time is a good thing. There's the least alien-speak in ESB, which is generally seen as the best, so that might tell you something. If Mas Amada spoke in gibberish, I don't see how that would improve the film one bit.
2- Every actor has seen Star Wars.
I don't know what he means by this except a vague "I think the acting sucked."
3- George Lucas is a terrible director.
I'll agree that Lucas's tendencies as a director don't lean towards compelling storytelling. But this is hardly a new idea, even in 2010 when this was written.
4- Too much explaining.
I agree this is true, but on the other hand it's the main reason he made the prequals so we can at least agree that it's not due to bad writing. Conceptually there's a flaw in the entire series.
This rambling and bitchy little essay wraps up with my favorite technique of the Prequal Basher... the "They NEED to make a movie to my exact tastes, and my favorite of the month (Jackson, Whedon, Nolen) needs to direct!" argument.