To me, the appeal of zebra lines in FCP 7 was I could tell what was overblown. With the histogram or wave form monitor, I can get a good idea what’s blown out….but I can’t see precisely what it is. Sometimes, if na image is dark enough, I don’t mind if something is overblown if it’s inconsequential and it means I can brighten the rest of the scene. But it’s hard to be as precise for that usage without zebra lines in X.