Good question! I don't think the original was "bad." I mean it did win a Grammy. "This re-release comes upon the reclamation by our label, GroundUP Music, of the original masters and is a celebration of independent music!" -
www.snarkypuppy.com So it appears that the re-release had both commercial and artistic motivations. The original recording was released on Impulse. The record company would have owned the rights and controlled the way it was mixed and mastered. As record contracts go the label was responsible for promoting the record and got a cut of the revenue. Can't fault them for the promotion...the album did win a Grammy. When the band's label, GroundUp Music, obtained the rights from Impulse it gave the band the opportunity to tweak the original recording and reissue it. I must say it is an *****in' phenomenal recording and performance and the remastering/remixing certainly does it justice. Now the band has an opportunity to promote the album through their own label and not have to share revenue with Impulse.
These guys seem to be excited about it:
https://www.quadraphonicquad.com/fo...he-metropole-orkest-is-coming-in-atmos.35889/
I would say to differentiate it from the original. The recording and performance is the same as the original on Impulse, but the re-release is a different album on a different label that has been remixed and remastered.