So, the question for your stuff is, do you need inheritance.

When deciding on whether to use OO, inheritance is never in my the calculations and performance rarely is. In Perl at least, the main reason to use OO is that you need more than one "object", that is, a collection of data that you define some operations on. If you need more than one collection of data and more than one operation (especially if the number of operations is large or likely to grow), then OO is a good choice.

You can do inheritance via Exporter.pm, using closures, or AUTOLOAD (to name a few), with or without the ability to create objects.