I don't think they will change it, but assuming Otto's box works the way they do now they will still provide 1,970,000 xp on a third life vs. 2,000,000 with the new boxes. The main thing with the old boxes is that you have to use it right after leveling to 8 and you want to gain as little xp over the min for level 8 as you can. So slightly less flexibility, but almost as much xp.