It's quite a challenge to use package interchangeably from one distro to another. The deb format is not the problem (it's seom standard ar archive format and I remember it contains some files to be uncompressed in / in the same way than a tce). However lot of challenges would arise because pre/post install/removal scripts likely would fail in tc, because of mismatched version of libraries, and because you would end up downloading a good part of the base unbuntu/debian in order to meet dependencies.