What always annoys me about Perl is that you can't create an alias for a package elegantly.

I would imagine something like this, for example:

use Very::Long::Package::Name as ShortName;

#perl

There is the following utility on CPAN, for example.

use aliased 'Very::Long::Package::Name' => 'Short';

Firstly, it's not very nice because you have to fiddle around with strings, and secondly,
something like this should be in core Perl. Because then IDEs could perhaps adapt to it or support this feature. I think that would be a very important point.
#perl

Man. Of course, you can also do the following, but it's not really nice either.

BEGIN {
*Short::Name:: = *Very::Long::Package::Name::;
}

#perl