In strategy games, a useful piece often refers to a unit, building, or technology that offers a strategic advantage. For "Queen's DisGrace," this could mean a piece that tips the balance in favor of the player or an NPC (non-player character).
Here’s a review for Queen’s DisGrace - v0.40 - Endless Effrontery , written in the style of an honest player feedback post: Queen-s disGrace -v0.40- -Endless-Effrontery-