I'm not particularly worried about Debian (or any other distribution) if only the packages that they package worked. They haven't split things up in that many packages, and if a Pike application is installed as a package the missing modules will be automaticly pulled.
In my nightmares we have a system like perl where you have to pull five modules from CPAN to run any random application, and then discover that the modules are not compatible with each other and the application can't handle the new versions you get by default. Much like modules included in the Linux kernel get fixed if they are included in Linus tree and die in ABI hell if not; separate releases of modules is going to add pain.