Quickleaf
Legend
Just to say I love this way of thinking the archetypes. It reminds me of the Numenera/Cypher system's way of creating characters with a Descriptor (quality)+Type(broad class group)+Focus(Speciality).
I'll give it a try (I'm still in the camp that feels like the figher is somewhat lacking in flavor, while still being a strong class).
The CHAMPION is a DRIVEN WARRIOR who PRESSES THE ATTACK RELENTLESSLY.
The BATTLEMASTER is a CLEVER WARRIOR who FIGHTS WITH PANACHE.
OK, to distill yours to the format of [noun] [verb]...
The Champion presses the attack relentlessly.
The Battle Master cleverly fights with panache.
I'm assuming you can see how ambiguous and "weaker" (in terms of identity) those phrases are compared to: The Thief breaks in and steals stuff.
While your statements are objectively true, they are limited to how this character fights. IF I had described the Thief in that way, I might have said: The Thief sneak attacks enemies from behind.
Again, true, but it doesn't capture the concept of the Thief in the overarching narrative of the game. Instead it pigeonholes its definition to how the character fights.