I just re-read my post and realized it might not be clear to those who have not been to DL and are only familiar with MK.
Splash in DL is not located in Frontierland, but instead is in a sort of mini-land called Critter Country. The only other attraction in this "land" is the canoes. The Country Bears were there of course, but are being replaced by Pooh. The main reason as I understand it is to find something other than Splash to get folks to this area of the park.
I'm pretty sure that before Critter Country, the Bears and the canoes were a part of Frontierland.
Regardless, the look of this mini-land is very similar to Frontierland, so that's why the Pooh attraction looks so much like Splash, as opposed to the Pooh in MK's Fantasyland.
At first I thought Pooh wouldn't really fit in CC, and belonged in Fantasyland. But after more thought, and now seeing the pictures, I think it can fit very well. Certainly as well as the Song of the South characters in Splash. Poohs colors are mostly earth tones, so they shouldn't stand out too much.