Yes. Good idea to put up a sid chroot which could avoid dep problems. This looks rather like a brainstorm to me, it's not yet implemented, right ?
Still the basic idea was the possibility to install additional packages into RAM, for any rare and improbably recovery or other task. So apt should be available, and a tool like aptitude could be included, too. The whole thing probably would fit best into netinstall, but hopefully could be added to other installer or recovery images too. ° /\/ m°
