The main page of the Lodestone says every 12 game hours, when it's really 12 eath hours, however this typo is not my quarrel with Guardian's favor. With the new Leve system I usually have 80+ Leve credits, however I am always out of Guardian's Favor.
10 points, which is 1 Leve every 12 hours is pretty bad.

As I discovered yesterday while leveling my Gladiator; Doing leves without Favor active is pretty sad... I was level 14 so I did a level 10 3 star Leve... the first mob (level 16s) gave me 101 experience points... when I finished the Leve I went and started smacking Level 12 mobs around, and they were giving me more experience then the Leve mobs were(132 experience, and took less time to kill)!

I don't think The favor system needs to be Abolished completely, just adjusted to match the new Leve system, maybe giving us more Favor every 12 hours, or keep the 10 Favor every 12 hours and reduce Leve favor cost to 1.