Two more annoyances for you.

First, if the first CPAN mirror is down, with every single file CPAN fetches, you have to wait for it to rediscover that it can't fetch from that mirror. Why not have it on the next file rotate its list of mirrors so that it first tries the one that actually worked last time?

Second, on Ubuntu if I do sudo perl -MCPAN -e shell, the crypto bit gets all unhappy because root tries to access my user's keychain and decides it shouldn't. I have to (sudo su; perl -MCPAN -e shell) instead. Very minor, but if I'm listing annoyances, why not list it?