I leveled a Marauder mostly for the lore and buff, but also since my main is a healer, I wanted to understand the class better in order to negate it in PvP. I let it sit for a while after reaching 50, and 2 days ago I logged onto it and, having never played Rage before (was always annhilation or carnage) respecced.
In full recruit gear, speccing into rage 30 seconds before the start of the WZ, having never even practiced the rotation against npc's, I got a 5k dmg medal and a 300k medal in an average Civil War game. Easiest, but most lethal, spec I've ever played / seen.
I'm sorry, but if this isnt the definition of OP, I dont know what is. I could list several more examples but I think this suffices.
*edit - I had a Battlemaster mainhand augmented that I purchased immediately upon hitting 50.