Okay, the names make sense to some degree. Thanks for posting them here. This is where I feel that the game has gone too far though.
Let me ask this, are there specific game rules that work with these "abstract" role names? For instance, are there any instances of a power or ritual that specifically deals or benefits a specific roll? If so, then the abstract naming convention for that character or creature (leader, controller, or lurker for example) then falls into the trap of over-design because then you are pigeon- holed into that role because their are specific game rules that cover that role. The first I can really think of is the minion. What other rules might be specific to a certain role?