Honestly, I'm still not sure if Recruit > Champion gear for Marauders. I'd have to look at the stats on individual pieces, but 300 endurance and 200 strength is a huge loss for 72 surge and 4% from expertise. That said, it will pretty much make every fresh 50 a contender.
Either way, unless they change the set bonuses, I'll still be sticking with 4/5-5/5 PVE set and the rest PVP. Which I imagine will put me somewhere in the realm of 18-19% pvp bonus via expertise with War Hero gear.