The issue was with consuming the role and trying to leave the required methods' implementation to a subclass (example)

Using the Moose Role as a sort of base class on its own (possibly adding some concrete common details) allows it to be extended/specialized like I wanted, and is satisfactory. stvn pointed this out.

In reply to Re^2: Abstract Methods in Moose by crashtest
in thread Abstract Methods in Moose by crashtest

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