We all know how boring War Zone can be in Horus - maybe on other servers too. Main problem because this happens is that most of grinders are in Inner Zone where they have good cozy grinding spots. This keeps them distant and unwilling to fight alot players. They do not care whats happens into War Zone, because they have mobs and safety.
Bringing grinders after level 37 into War Zone will make them willing to participate in hunts, fort fights because this will give them safety to grind. This will teach them to work in teams, because you have to protect grinder next to you, so he will help you next time when you're in trouble. This in other side will give to lower players knowledge what spells and setups are used against them, and they will be close to more experienced players that are constantly in War Zone.
I really really see no downsides to move all higher mobs to be only in War Zone and even give XP bonus of grinding there. This is war game and Inner zone is only to be used till you get your level 5 powers.
Game in Horus became boring...
Slides are from Piz's comic.