I still can't believe we don't have a hood toggle. The command to remove it is already in the game for when you put on a helmet! Just wire that command to a button and we're done! I don't know a ton about computers, but that doesn't sound all that hard. Come on now!
That's not the same thing. As others have pointed out, the current helmet function just removes the hood entirely from the costume, it doesn't lower it. I thought it lowered the hood from how some talk about it, but it doesn't. And the head being gone entirely does make a big difference in the Jedi robe look.