Most likely, someone will say "What does it matter if the opening and endings are changed" when the subject of these changes comes up. And my answer is: "Who would have cared if Manga left the opening and endings alone (with kanji credits left as-is) and ran the English credits after the proper endings?" The answer is: "No One"

It may not be the end of the world, but it's a useless and unnecessary change that alters how the show is seen by the viewer. I'd venture a guess that most anime watchers don't read all of the credits and a much larger percentage of viewers would rather watch whatever animation or pictures were there on the original version.

In the opening sequence, where the original Japanese version had credits in kanji, they've excised that footage and replaced it with letterboxed footage from episodes 1 and 2. Also it appears that at the very beginning with the shot of the earth gradually growing larger and larger, they've utilized a wave effect to hide the fact that they use a freeze-frame of a particular scene.

The ending sequence fares even worse, as it's simply one still from the original ending sequence, with English credits scrolling up.