It's ok to have several different soundtrack options available, as long as it doesn't hurt the picture quality. :) If the foreign language tracks are removed and every inch of space on a dual-layer DVD is used, then there should be enough room for a few soundtrack options, while maintaining picture quality.

This 70mm stereo soundtrack sounds interesting, in that it's apparently just like the 93 Definitive Collection laserdisk soundtrack, but with no added sound effects. So it's an authentic theatrical soundtrack? What source was used to get this 70mm stereo soundtrack, is it complete? Does it sound as good as the Definitive Collection does (in terms of overall quality)?

The nice thing about the soundtracks from the Star Wars laserdisks is that they are good PCM tracks, not heavily compressed like you often see on DVD's. So the original uncompressed PCM soundtracks can then be compressed into 448k DD 2.0 soundtracks, for the best audio quality you can get on DVD.