If you want to know my feelings on how the retheme relates to the issues you raise, you can look at my earlier posts in this thread. To summarise, I personally love the current theme and will be sad to see it go, but I also understand why the retheme is happening, think it’s the right course of action all things considered, and am remaining optimistic for the outcome.
As for this current mini-discussion, my sole point was that it is factually and demonstrably untrue that the ride’s relationship with Song of the South is limited to just using some of its characters. I’ve seen the film multiple times (I owned a copy on video as a child in the UK), so I know what I’m talking about.