Well, the theatrical bootleg would be of value in terms of sourcing original dialogue (ie: Padme's "Uh-huh" or whatever it was originally) if there were no better source. Was AOTC ever released in its' theatrical form on VHS like TPM, or on a Japanese laserdisc?

At the every least, a comprehensive "watch through" of the original theatrical cut would be in order just to see how many things were actually altered for the Official DVD.

Only question is, was the IMAX cut taken from the 35mm version, or the DLP version?