QuestWorlds is meant to facilitate your creativity, and then to get out of your way.
It is well suited to a collaborative, friendly group with a high degree of trust in each other’s creativity. Characters in QuestWorlds are described more in terms of their place in your imagination and the game setting than by game mechanics.
If your group are often at odds and rely on their chosen rules kit as an arbiter between competing visions of how the game ought to develop, or use mechanical options to decide "what action to take," QuestWorlds is not a rules set that provides that structure. Make sure to discuss with your group whether you are collectively on board with trying a new play style dynamic, or if you would rather stick to more structured systems.