I will absolutely agree that AST is unbalanced in comparison with WHM/SCH and won't argue that point in anyway, shape or form. The only thing I will comment on is that the groups who do this kind of thing are more often than not groups that a good player would rather not be a part of anyway. From my experience, groups that role lock based on a meta and not on general party balance are often so incompetent and have failed so many times that they're trying to up their odds through party composition rather than actual skill.