It looks like discussions are getting somewhat heated, so I might regret this. But here are my two cents:
First of all, I love Rivers of Light in its current form. I realize that I'm probably in the minority, but it's arguably my favorite nighttime show currently running at WDW. I love everything about it: the music, the visuals, the lotus flowers, etc.
That said, I am in the minority. I can see why so many others were underwhelmed/disappointed: the finale is a little anticlimactic, it does have very real technical issues, and it doesn't really have much of a flow to it. So I can see why Disney would want to overhaul it; they have to please their guests.
Let me also say that I have no problem with Animal Kingdom having an IP-driven nighttime show. Joe Rohde has always been very protective of this park, and he has never really let anything truly awful have a permanent presence there. If this new show is done with a similar style as the Tree of Life Awakenings, I think it will be very tasteful and appropriate.
However, I fail to see how this overhaul will change anything. If I understand it correctly, all they're doing is swapping out some live-action animals and original music with animated animals and classic Disney music. That's nice and all, but it doesn't address any of the commonly heard complaints I mentioned above (finale, pacing, tech difficulties, etc.). It sounds like the show's flaws will be remaining exactly the same, but now the flaws will be accompanied by Disney music.
If you want to change the show, then change it. Go back to the drawing board, and draw up an all new show - with or without IP. The presence of IP doesn't bother me; it's the assumption that merely throwing some movie clips will remedy any issue with the production. This just seems like Iger's "nondescript coaster" comment all over again.
Anyways, that's my two cents. Not trying to contribute to any fights, all IMHO, etc., etc...