Also, here’s a suggestion.
I think the audio tracks on the Despecialized DVD-5 versions should be the 2.0 mix instead of the 5.1 mix.
I think of the DVD-5 versions as budget versions for people without a Blu-ray player or a method of playing MKVs on their TV.
And there are still many people with only stereo speakers for their DVD player and that 5.1 downmixing results may vary, along with the fact that the Dolby Surround 2.0 mixes can be matrixed to 4.0 or 5.1 with Dolby Pro Logic (II) with good results.
I think a 448kbps Dolby Digital 2.0 Surround mix is ideal for the DVD-5 Despecialized Edition.