D'oh! You're quite correct, though it can be fixed with additional hackery: 
package Bogus;
use Data::Dump 'pp';

sub foo { printf "foo got %s\n", pp([@_]) }

sub bar { printf "bar got %s\n", pp([@_]) }

sub baz { printf "baz got %s\n", pp([@_]) }

package MyBogus;
use Moose;
use MooseX::NonMoose;
extends 'Bogus';

around [qw( foo bar baz )] => sub {
    my $orig = shift;
    my $self = shift;
    $orig->(@_);
};

package Tester;
use Moose;
use MyBogus;

has 'bogus' => (
    is => 'bare',
    default => sub { MyBogus->new },
    handles => [qw( foo bar baz )],
);

package main;

my $tester = Tester->new;

$tester->bar('bar');
$tester->foo('ram');
$tester->baz('ewe');

__END__
prints:

bar got ["bar"]
foo got ["ram"]
baz got ["ewe"]

[download]

In reply to Re^3: Moose: Accessing subroutines in packages used by Moose class by Arunbear
in thread Moose: Accessing subroutines in packages used by Moose class by nysus

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