1. What is the rational for the proliferation of directories.... and why do I need to specify all of them in PERL5LIB?

Choice is choice, and you seem to have picked the extra VERBOSE choice, and mixed it with something else ....

Why can't Perl expand /home/services/foo/perl5/lib/ as it does for the default library path?

You only have to add one path to @INC if you do it the INSTALL_BASE way ( local::lib way ) as demonstrated in Re^3: object version does not match bootstrap parameter ( cpanm --local-lib PERL5LIB)

In reply to Re: Why does PERL5LIB need to be so verbose? ( INSTALL_BASE the local::lib way) by Anonymous Monk
in thread Why does PERL5LIB need to be so verbose? by kiz

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