I'd wish:
it would look up nearest available CPAN archive for the required module, but not before performing a spellcheck :-)
it would install the module in a lib directory of the user as long as there are more users than roots out there :-)
if no directory is specified the module should "fall back" to a "standard value"
it would then use the lib
as long as all this sound like music it actually is only based on various package managers for perl and unix.
Didn't I hear something like: "with Perl you can do everything"? And in this case I don't see that it would be something the world doesn't need at all.
Have a nice day
All decision is left to your taste