If you're going to take the checks out, why use Moose? Seriously, just use a href directly. (When do you really need method calls to attributes? Encapsulation? Hello, mantra. You're adding these unnecessary layers when you don't really need it. If you need it later, add it later! Perl is not compiled. Why are you creating a static API?)
Re^3: The speed of blessed hashrefs, the power of Moose - how to get both?