Also I note that your "preferred way to call constructors" comment is just cargo culting unless you can give some concrete reasons why that is preferred.

(of course you know this but) fear of imported subroutines is one reason ..

# Stuff.pm
package Stuff;
use base 'Exporter';
@EXPORT = qw(new);
sub new { print "this is exported new!\n" }
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# new.pl
use Stuff;

my $foo = Foo->new;  # this works
$foo->baz;

my $bar = new Foo;   # this doesn't
$bar->baz;

package Foo;
sub new {
    my $class = shift;
    print "constructing a $class\n";
    bless {}, $class;
}
sub baz { 
    my $self = shift;
    print "hello from a ", ref $self, "\n"; 
}
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% perl new.pl
constructing foo
hello from a Foo
this is exported new!
Can't call method "baz" without a package or object reference at new.pl line 9.