Battlegrounds Energy Cost
15 energy is just too much. I'm only grinding the objectives for this game mode rn because I want as many 6-star shards as possible for the upcoming featured crystal but beyond that, I don't know. From event quests, the side quests that do have energy costs (though the last 2 I believe didn't), 100%ing all the back issues, exploring act 7 and potentially act 8 (when it comes out) I just don't have the leftover energy to also play battlegrounds.
It should function just like incursions, with no energy cost.