Now, nitpicking: When the badges move, the speed is not realistic. Of course, that's only natural, because it's just an update to its new position, it's not actual motion. But it's still jarring to see buses zooming across 3 blocks in 5 seconds. :)
Would it be possible to visualize the position update in a different way, to better suggest it's just a position update, not actual motion? I'm thinking, leave the badge in its old place temporarily, make a new badge that moves quickly to the new place, and leave a faint low-contrast or transparent "trail" connecting the two. Once the new badge is in the updated position, remove the old badge and the trail.
Basically, the whole transition should be much quicker, and clearly indicate it's an update, not actual motion.