Other than keeping Ivanova, I can't think of anything else I'd wanna change. Although I think it worked out in the end with Lockley, I happened to like her character. I think even Byron was necessary, even I couldn't stand the idiot. He had to be portrayed like a freak cult leader for it to work. It would have been nice for Lyta and Zack to get together though, and not her and freak-teep Byron. I even liked some of the episodes that were not part of the arc mentioned earlier, like Grail, TKO, etc. They showed another part of B5, other than the political intrigue and shadow war.