I don't hate the idea of Splash being rethemed to PatF, in fact it's something I always had in my mind as a cool idea for a Splash retheme. Hopefully they keep some of the animal animatronics, and maybe they can even keep Zip a Dee Doo Dah as the finale song? Though not exactly holding my breath on that one, but it's such a classic song that I hope it still appears in some way in the new ride.
That being said though, I do think the idea of retheming/changing everything just because a small subsection of people might be offended is a potentially slippery slope. The Pirates auction scene was one thing, and now this is an even more drastic step. Splash was based on the stories of Song of the South, yes, but the ride basically removes any racist connotation featured in that movie. I mean people could find offense in just about every classic Disney attraction you can think of.
Haunted Mansion? That's making death seem fun. I'm offended, remove the attraction!
It's a Small World? Those scenes are just showing stereotypes of various countries around the world. I'm offended, remove the attraction!
Carousel of Progress? That shows the wife only doing household chores. I'm offended, remove the attraction!
Hall of Presidents? Some of those presidents once owned slaves. I'm offended, remove the attraction!
See what I mean? There's certain attractions that are classics for a reason, and are still beloved to this day by the vast majority of people, and it worries me that Disney lately has been so quick to respond to a very loud but tiny minority of people that find offense in everything.