Instead of using code references the way you mention in your question, you can keep track of the subroutines using a hash like this :
(You may put this into another package & use it in your script)

my %code_ref_hash = (
'method1' => \&Package1::Method1,
'method2' => \&Package2::Method2,
);
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So that when you want to call a method, u can just use:

$code_ref_hash{'method1'}(); # OR $code_ref_hash{'method1'}->();
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Instead of using references, you have the name of the method instead.
However for this, you have to 'not use strict on refs':

no strict refs;
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