I have always wondered whether being streaky decreases value. I don't know it's been researched. Crudely, let's say player A is a 6-WAR player. He is 3-WAR in April and 3-WAR in July and is replacement level the rest of the year. Player B is 6-WAR, but he is 1 WAR each month. Which one has more value? Is it about timing? If player A gets hot when the team happens to be involved in a lot of close games, then his hot streaks will become more valuable than his WAR suggests. On the other hand, he may get hot during blowouts.