Isn't that what the itch.io and public patreon messages and updates are for? As for the OST, its of such high quality that i would assume it would sell well. I honestly wouldn't mind if the OST was added as a separate itch.io project or dlc for this and just get added to as it goes on since i would be more than happy to drop cash up front. I'd easily drop £10 on it can't speak for anyone else tho (and im terrible at judging prices isn't it wonderful).
I'll probably bundle a copy of the OST for existing Patrons at some point once it's fully remastered, and then as additional DLC for Steam release when we get around to it.
The main thing about releasing any of the OST thus far is that they all need tweaks here and there, and I'd rather present the best version of it forward.