Perhaps your code sample is too simplified and out of context, but I see absolutely no reason for using symbolic references. Heck, even within context I doubt it. I've written dozens of Perl modules and programs and haven't really needed symbolic references, except within the very limited context of exporting symbols or creating methods automatically (which doesn't seem to be the case here).
Added 3 min later: if you don't know the name of the subroutine beforehand (and that's why you have it in $x), you can achieve a similar result without symbolic references by using object-oriented notation:
require Value;
$x = 'getValue';
Value->$x();
Note that you'd have to change the getValue subroutine so that it shifts its first argument, which will hold the package name.
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