No I don't mind! The arm things are actually multipurposed (Though I only drew one aspect of it). It basically helps the pilot fetch objects in the cockpit, in this case, it is equipped with an sniping assist mechanism (Because this pilot and Craft are artillery type). It also fetches the water bottle for the pilot, places the helmet at the back and can also help the pilot equip and inject performance enhancing drugs(If they're needed).
The cups would actually have covers which prevents spillage xD. But um, this cockpit is actually designed for an artillery type. The mechanical arms above his head are supposed to be the aiming assist mechanism. The flight type Crafts possesses a different type of cockpit design.