Agreed. Aggron loses pretty badly to most things that can hit its weakness from the special side, while Camerupt is murdered by water attacks. Aromatisse... is ok, I guess. I never used BR Draining Kiss, yet Aroma has been really useful. However, it doesn't really beat anything badly (except maybe Sableye) so B should be a nice place for it.
About Conkeldurr, it really needed to go up, and with its sheer force (pun semi-intended) it might even warrant a change all the way up to A.
Also, as much as I trained my Lucario, it doesn't belong to B+. It just doesn't hit that hard, doesn't have many tricks to help him survive bad matchups (the only thing it can really do is phaze and suspend dig, the later not being very good when you are weak to ground) and has bad bulk. It should move to B or maybe even B- (although B- is kind of... weird atm, regarding the mons that are there. I guess that can be discussed later.)