I like legacy much better cos it makes reading easier.

In legacy you have: post, sig, post, sig and so on.
in the new one you have: postbit, post, sig, postbit, post, sig, postbit, etc.

I want to read the posts, I don't really need to read or scroll all the postbits in every post. Thats' why, when having a quick look at the threads, the legacy style is much more convenient, regardless of the blank space left.

Look at a post like Gare's, nice sig in size, medium avatar, there's barely unused space and I don't have the postbits in between the body of the posts and sigs. It looks great.