Me too, I just explained it to myself as him viewing a smaller body to be more practical in combat lol.
When I first saw HotS’s trailer I was kinda excited to play it, but what really got my attention was the Abathur portrait at the end of the trailer, I was praying for it to be Abathur and when I looked HotS up and saw Abathur there I was dead set on playing this game lol.