Doing all the tasks in a specific area, like electrical or medbay.

1st you literally cant drop back down to 0, the game just wont let you drop trophies at some point, 2nd this would make it extremely unfair because pepole would basically only speedrun with maxed brawlers, that would ruin the current leaderboard, its not too bad of an idea to add a seperate category for brawlers that you didnt basically just get but thats my opinion, just another category.

You mean a record or just a decent run? Also it all depends on which run you are doing, are you doing a set seed or a random?