I'm not against the idea of a larger quickbar/more quickbars in theory, but Grokalibre has a good point about this possibly being a balance issue.

Mana has been removed, and so the limits on what a mage can do are now only cooldown and AP. Giving them access to double or triple the skills for free can neuter cooldown, and then what? Yes, right now you can switch skills on the skill bar for free, but I'm not so sure that's a good idea either (I'm thinking that switching skills should cost 3 AP per skill).

Unlimited freedom is not always the best policy of game design.