These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Legend System
Crazy Awesome: Pretty much everything, but this was the specific design goal of Chirurgic Poet.
Game Breaker: Up until the January 2013 beta, Discipline of the Serpent enabled monks to out-damage barbarians and rangers at high levels. This resulted in the Flurry mechanic being completely scrapped and the track being rewritten from scratch.