Inverse, you can say what you want. This is not right. Units are not meant to get stretched out like that. If it was then it would be in the description of the gameplay infos ingame. It is a result of bad or not complete programing of the engine. I don't think that Relic knew that and still left it in the game. Some hyper active player discovered it, that does not mean that it is ok to use it tho. Because you are hangup on the word Abuse i will say that it is an exploit!
P.S. I think you are defending it because you see it only from the competitive side and if something gives you an advantage then you like it. So i don't share your side even if you would describe it as a Super hot naked Blond on my bed
P.S. II. I give a sh.. if this happened in over (competitive) games, that doesn't effect me so i cant take it as an argument.
Actually it is ok, unless Relic decides its a bannable exploit (or fixes it). People getting worked up over this shit is hilarious, its not even a gamebreaking bug. Now if you were getting upset because people discovered a bug that made units sprint everywhere (like the British Captain bug) then that would be understandable since that actually makes a huge impact, cap walking does not.