The Alpha Videos have all been captured with the game running at a resolution of 960 x 540. And the game renders the UI as a 2D overlay. So yes the UI looks a little large in those videos but it's still acceptable. But at 1920x1080, they are far too small.
Here are some snapshots showing how the UI looks at 1920x1080. You'll notice it's hard to make out.
Being able to move and scale UI elements does NOT benefit the player in anyway. You just want to move stuff for the sake of customization. That is bad, and you will always find changing it has unintended side effects that often force a complete reset of the UI anyhow. The Devs have played this game already MUCH more than you have. They better understand it. Let them decide the UI layout.