"Recently there's a been a lot of discussion as to which patch Stage 4 of the Overwatch League will-and should-be played on, 1.22 or 1.23. The league and the developers share the goal of Overwatch league play being on the latest patch possible, with certain exceptions. One is if it would be unfair to introduce a new patch mid-stage, in the heat of competition. That's why the patch that reworked Mercy, which went live in Stage 1, didn't appear in Overwatch League until Stage 2. Another reason is if we feel a new hero, or significantly reworked hero, hasn't been available for our teams to practice long enough in advance of the start of the stage."