By changing up how you structure your wash drills and games you can put them to better work focusing on more specific things.
This bonus point oriented game is good for focusing on key developmental areas with lots of potential for varying the complexity and challenge level.
Simple game play in volleyball training puts me on edge. Adding a wash element can increase the intensity and make for a much more worthwhile session.
Here's a game I saw at UCLA which works on hitters challenging the block, with additional serve receive and free ball attacking
This is a fairly simple wash-scoring based game which gives players an opportunity to work on both serve receive offense and transition attack to score points.
This is a short-duration game which focuses on serve receive attack and secondarily on winning points in a row.
This is a back row volleyball game which combines cooperative control elements with competitive ones while working on both back court attack and defense.
Wash drills and games involve scoring systems that require a team to accomplish multiple things before they can earn a point.