I've made my peace with the Disneyisms in the movies; it's an alternate Pooh that retains enough of the original to be appealing. But that's partly because the Disney Pooh was really the first one I was exposed to in childhood.

I've also seen some of the Soviet Vinni Pukh shorts; they're very, very good, and in some ways closer to the source, the big modification being that they removed Christopher Robin and gave Piglet most of his lines. But the Soviet Pooh is as different a take on the character from Disney's as one could imagine, while still, I think, being supported by the text.