Before the change, the results on search.yahoo.com were directly related to the search results that where given on answers.yahoo.com/search. For example, “what color is the sun” would include only answers that where returned here and in the same order but minus certain listings. The difference being Answers search results included listings that could be open or closed and may not have had a best answer while the main Yahoo SERPs included only listings that where closed and had a best answer chosen.
The new listings showing up on the main SERPs are much more relevant and helpful than those being returned by the Answers search. While some answers may appear in both results, they seem to have no direct relation to each other. The new algorithm seems to favor the actual question itself very heavily. All the answers I see returned include every word used in the search box. This should actually make it easier to craft and target questions to rank in the main Yahoo search results.
I would say the change is a positive one and suggest they use the same changes to power Answers search directly.