Although I've to agree with Loki that Razurs constant complains about champ being weak are annoying because it is definately not, they are certainly not op either.
Champ is certainly a pain in 1vs1, but that is exactly what he is supposed to be with all the tools he has, and the only place where he can really shine atm. Right now they only have a spot as the last of 4 possible melees in a hib tanker with 4 naturalists. In 5 naturalist settings champ tends to be overlooked mostly because he doesn't offer the same raw dps of vw, bm or hero, and you really need that with only 3 dps classes. In caster setups - of which you don't see many atm - hero and bm outclass a champ due to stoicism, better peels on bm and better actives on hero. If the warden change goes through, they may have a more consistent spot in groups, but even then I think champ is nowhere near op and certainly doesn't need a nerf.
Btw, we had a nice /gvg fight vs your pug yesterday, Razur, and it showed clearly that a champ is nowhere near useless in groups. You locked my pac down for quite some time, because I couldn't ourtun you even when you got peeled due to your snare shout to get to a decent range to cc you, couldn't MoC outright because you still had ST up, and only once you got slamed I got out of range. No bm or vw could have kept me busy for so long, and when you were training me together with one bm at the beginning of the fight we were under a lot of pressure.
In addition, champ can't spec for annihilation without sacrificing slam or red debuffs, so if you encounter a champ who's dealing serious melee dmg, he likely has low defense or only mediocre debuffs and no capped s/c selfbuff.
All in all looks balanced to me, although Razur's gonna disagree and will suggest to buff champ anyway.