Angel isn't "showing off" so much as trying to inspire everyone's imaginations, including Ady's. If a picture is a thousand words, we're saving time trying to describe what we see by mocking it up. Ady uses some of the ideas from the mockups, and may even be using some of Angel's work.
I worked for weeks with ImperialFighter to do some primitive (compared to others) mockups of fleet positions around Hoth. When Ady released a clip from that section of the movie, we found that nearly everything we had mocked up had come to pass. Whether or not Ady actually was inspired by ImperialFighter's ideas has not been said, but I finally felt like I contributed something solid to the project, instead of just my comparisons.
Please mock up something if you have the time. I would love to see what you can do now!