Sony finally lost the license and Disney records put them out as soon as they could so they could get that money. Nothing remotely pertaining to the release of the OOT here.
Is it not significant which version they chose to put out? As far as I can tell, there is no © Lucasfilm version of the SE soundtrack just released.
I don’t think so. The ones Disney just put out are all the original soundtracks for all 6, which were all just remastered for Sony’s ultimate digital collection in 2015.
I think they’re keeping it simple for now with just the OSTs. The Special Editions are a more extensive program (and were mastered in 97 and don’t necessarily sound that great) with 2 discs each and are related to the SEs in name only, besides ROTJ. My guess is they aren’t putting those back out because they’re cooking up their own remastered expanded releases for all the films.
Notice they didn’t put out the TPM Ultimate Edition either.