Content scaling would be a great way to have. That would keep a lot of people busy, at least I hope. But I don't want them to do the same thing as they did with ZA/ZG. Release redone instances, and trash the originals. There needs to be an option which would allow you to switch in between old and new instance, kinda like heroic or normal mode. I mean I still love soloing or running with friends raids such as AQ40 or BWL for transmog gear or for good old times.