Yes. And in this code:

package Some:Module;
use vars q/test/;

## Here "Global symbol "$test" requires explicit package name".
$test = 1; 

sub inHere {
    our $test; # ok.
    our $tset; # typos/thinkos causes errors.
    my $test;  
# my variable "$test" overrides variable with the same name at differe
+nt scope...
}

1;
Some::Other::Module;

sub inThis {
    our $test; ## is an error.
}
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If it is possible to get this behaviour, changing use vars; to work this way would probably cause backward compatibility issues, so maybe use globals qw/$var @var %var/; would make more sense.

That said, maybe something like $var : global = 1; would be more in keeping with the latest trends and prehaps more compatible with P6.