Disneyland's ride will mostly fit seamlessly into New Orleans Square. WDW's version is going to look VERY out of place unless there are some alterations to the immediate surroundings. WDW's Splash Mountain was modified to help it fit the Frontierland setting (scrapping the swamp setting, using red clay on the exterior, music remixed to country/bluegrass etc). This had the double benefit of also making WDW's superior to Disneyland's IMO. Tiana however isn't getting these sorts of alterations to help it fit. The Riverboat is the only thing that will look correct in the immediate area.
IMO, redoing Pecos Bill's is probably all they need to do to correct the most glaring issue with the ride's placement, being shoved in between two western environments. That restaurant is rather large and wraps around the corner reaching into Adventureland, so the coverage of this change would be both substantial yet also not really encroach on much beyond tha. No need to mess with Country Bears, that's suitably far enough away that it wouldn't clash.