There's a pro and con to both options, but somehow I find myself liking the old system better.
While transparency is in general good, I do wonder how that would work to people trying to "neutralize" a post's reputation? I know I've found myself often in a situation where I don't find anything good about a post, but I don't find it to warrant a neg rep either. If I see that post being neg-repped, I would sometimes positive rep it to make it neutral. With transparency, would this show up as if I pos-repped it? If so, that would bring a totally different impression to what I intended.
And in response to some of DD's statements:
2. They do. I've done it myself, and I've seen negative post regulars get positive rep for (good) posts.
3. Again, same as above.