Quote from CryptiK. on the 7th of May 2016:
Well there is no specific eSport mode since its pretty much map based. And I'm pretty sure Blizzard are working on a specific mode for Ranked MM.
Was more so thinking along the lines of standalone competitions (ie; future CG leagues). Just seems strange to me that a BO1 could be potentially decided by a payload or control point, i would of thought there would be one standard game mode played and the maps for that veto'd down.
Looking forward to Blizz ranked though.