DBZ movies review question

[Kyo28]

I have a question for the reviewers regarding the various DBZ movie reviews. I have been (and still am) a fan of Dragon Ball since it first aired back in 1986 and I must say, the scores attributed by the reviewers have me baffled. I certainly don't want to criticize and think the reviews are indeed very helpful and informative but one particular point has me puzzled:

The Audio score.

I see that for the audio, most movies get rated a 3.5/5. What really surprises me is how a Blu-ray release in this day and age, with the main (original) audio track in Dolby Mono (that's right, it's not even stereo!) can get rated 3.5/5?

Granted, there are also additional DTS HD MA audio tracks in English (one with the original score, one with a US score), but I thought the original audio track of a movie should be the one that weighs in the strongest when giving out points. Look at it this way:
Let's say there's a Lord of the Rings release, with a Spanish DTS HD MA 7.1 track with all the bells and whistles, but the English audio track is a mere DD Mono track. I seriously doubt any reviewer would give such a release a 3.5 audio mark. Just because the original langauge is not English doesn't take away from the fact the audio of the main, original language is lackluster (and I'm still being kind with the word lackluster).

It seems to me like they just copy-pasted the audio track from the Japanese movie DVD's:
http://www.toei-video.co.jp/DVD/sp21/dragonball.html
Granted, the source material doesn't give them much to work with, but one would think they would at least put some effort in to giving the audio a bit of a spacial effect, even if it's just adding stereo effects to some sound effects.

I don't know, maybe I'm expecting too much or some might think I'm too much of a 'purist' for taking the original audio track as the main point of reference, but I can't help but feel they dropped the ball in the audio department.

Again, certainly not trying to criticize the reviewers. You guys do an excellent job. I just wanted to know how in such cases the marks are attributed and if the same would be valid had the original language been English and offered a DD Mono track.