The questline for Monk involves the WoL opening up seven Light Chakra and seven Dark Chakra.

Why, then, does the Chakra gauge only have five slots? Wouldn't it make more sense for there to be seven Chakra slots and once all seven fill up, they can continue to fill up to a maximum of fourteen chakra slots?

Meditation can make it so that you can only get up to the first seven Chakra, while the second seven can only be generated via the Deep Meditation trait to generate Chakra on critical hits.

Not only would this make the action more in tune with the job quests, but it would also help to deal with the overcapping issue that Monks run into when using Brotherhood after getting Enhanced Brotherhood, and can also allow them to hold onto Chakra in the event that raid buffs are coming up.