Lack of a preview button means I can't error check my code, in those cases where I need to use mark up for emphasis, protocol / grammer (book titles should be underlined, for example) or to identify LJ users.

Same thing is true for spelling errors, although that bothers me less.

I haven't figured out how to post comments from the comments page itself (and therefore I'm not sure it's possible).

None of the new features (insert photo, insert video, switch) have any value or use for me.

So, overall, the new format is worse than the old one, at least for how I use LJ.

Kiralee