BD-1 is a useful little droid with the right upgrades. And he's just cute.
Star Wars Jedi: Fallen Order has been compared to Metroidvanias for a good reason: it encourages exploration and has tons of hidden areas you'll need to come back to because you won't be able to access them yet in the beginning of the game. You'll notice some of these areas are blocked off by doors that won't open because you need to repair your Scomp Link first. This can be done early on after you have completed the Zeffo temple.
Full story from the WindowsCentral blog...