Easier to understand? Debateable. I feel that this

my @chars
  = ("a".."z", "A".."Z", 0..9
    , split //, qq(!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~));
[download]

looks a bit messy and it is difficult to see at a glance, or even with a long stare, if you've got them all. In fact, I think tilly will have missed one since qq{...} is going to lose the backslash so q{...} might have been better.

$ perl -le 'print for split m{}, qq{!@#{}[\]&*};'
!
@
#
{
}
[
]
&
*
$ perl -le 'print for split m{}, q{!@#{}[\]&*};' 
!
@
#
{
}
[
\
]
&
*
$
[download]

Cheers,

JohnGG

Update: Added one-liners to show backslash behaviour