@ Alex: I know about the json file, but I feel like I am modding the game and cheating if I do that, unlike changing settings within the game. With objectives, I try to save some SP for Advanced Tactics once I start deploying big fleets in the endgame. Without objectives, I can totally ignore the Advanced Tactics skill (as long as marines are only good for boarding ships). Without objectives, both sides have no distractions, no exploits, no tricks - just a simple melee slugfest.
It seemed strange that battle size can be adjusted within the game but not "maxNoObjectiveBattleSize", if the latter did not scale with the former.