I skimmed and wasn’t sure if I saw this:
You can switch quests during a quest dialogue by waiting until a “echo switch”(waiting until a new dialogue happens within a different character) by either mashing click on the next desired quest right before the next dialogue ends in multiplayer, or opening menu at the right time and switching during single player. This is especially helpful within long dialogues during the main quests where you cannot switch quests for example activate certain things like “talk to claptrap” after accepting the firehawk quest where you cannot switch the quest before the main dialogue ends after you accept clappys secret stash.
This is pretty neat. But there are still some annoying parts, like when angel does her whole “three hurdles thing”. You cannot mash during a dialogue with the same person talking. it sucks. I know save and quit works(and i use it constantly in single player to cancel dialogue during longer monologues), but in multiplayer its a huge drag for everyone.