There is definitely a case to be made for using ravager all the way to 60, IF you are pulling >4 mobs at a time reliably, AND can control the threat. I gave it a try, but either I wasn't patient enough, or without the perma snares of a mages, I just had trouble controlling threat with a single warrior in defensive stance. One warrior would pull agro, spike to 600-700 dps, and die, and then someone else would die and wipe :)
If you're cleaving, aka using your rage on WW, you're still doing decent aoe damage. It's just that one warrior will snowball, they do a little more damage, get more threat, take more damage, build more rage, etc.
Also, yes, if I knew what I knew now about the speed/limitations of multiboxed warrior cleave, I'd have done probably 1 warrior, 3 ranged, 1 priest or paladin. If you want level speed, do mages. If you want sit back and face roll one pack at a time, hunters or warlocks.