OK, here's what I know based purely off of common Hunter knowledge:
First off, you're taming a level 70 and then complaining it's hard to level its loyalty. Loyalty leveling is similar to regular leveling; it's based off of the XP you get from mobs. The higher the pet's level, the more XP it needs to raise loyalty. Thus, at lvl 70, you're gonna need a hell of a lot in order to raise it. Take it with you during a Kara run or during Heroics. It'll gain plenty of XP then.
As for the Ravager itself, it doesn't have anything special. It's simply a green ravager for lvl 70s who like the color, but don't want to tame a little lvl 60 and raise it up.
First off, you're taming a level 70 and then complaining it's hard to level its loyalty. Loyalty leveling is similar to regular leveling; it's based off of the XP you get from mobs. The higher the pet's level, the more XP it needs to raise loyalty. Thus, at lvl 70, you're gonna need a hell of a lot in order to raise it. Take it with you during a Kara run or during Heroics. It'll gain plenty of XP then.
As for the Ravager itself, it doesn't have anything special. It's simply a green ravager for lvl 70s who like the color, but don't want to tame a little lvl 60 and raise it up.