CASSIAN, DON'T BE JEALOUS!! You can have a weapon too, until it disappears once Alhaitham's done using his vision! I think it's be interesting to find best uses aboard with different people's perspective since he only uses it when it's useful, and he doesn't make any effort to hide it, it's just a glowing jewel on his outfit. I also saw that Cassian is trying to search and repair things, and Alhaitham comes from a nation where it's very big on technology! So he could assist in that too, he actually made a mp3 and headphones on his own with a noise canceling setting. He's also hacked into a big network... etc and if you find any unknown language, Alhaitham can (will learn to) maybe translate that so if you find anything weird on some computers... points eyes at your eyes... never know when you'll find some unknown documents every now and again!!

Yes! Alhaitham too, he's very much a thinker, and while he can be a fighter, he'd rather worm his way into the source and get rid of it so he doesn't have to do anything at all! They could have asshole to asshole communication and I think they'd just understand without getting up in arms about it. I think this is how friendship is made!