Answer: one -package is easy to install first time, but you want to download everything again when there is a small bugfix of 10kb change and you wish download 200mb for it?
YOU ARE CRAZY IF YOU INTENDED TO UPGRADE ZERO-K WITH APT!
rapid install changed/new file that is why it is better. apt always download the whole package. and zero-k team don't maintain it as far as I know.
TheSponge you may learn more about packaging, I don't do it myself but Im aware of why they are in seperated packages. You want all-in-one then make it a virtual package but I don't think anyone would make zero-k included.
So, use what you have, spring ppa + rapid, any other problem?
or you have weblobby now, which is easier. Install OpenJDK, then browse
http://weblobby.springrts.com