I wound up giving up (fairly quickly ...) on the autobundle approach, because it appeared to be doomed to causing me to install whatever was there, as opposed to whatever was (still) needed.   (It’s rather amazing how much “cruft” winds up in a PERL5LIB over time ... almost as bad as a typical Linux distribution.)

Over in this thread, http://www.perlmonks.org/?node_id=909966, I took a different approach to the problem.   I decided to try to find out what the installed code actually used and to automagically install that.   I even came up with (and contributed ...) a somewhat cleverly lazy (if I may say so myself) utility.