They knew that the hitboxes are a win or lose. They consciously made that decision long ago. There were numerous threads about that this will make smaller legends OP.
They do not care. It's purposefully broken to give TTVs "content" so they can "stomp noobs" in public matches. Just looks how many of TTVs are playing exclusively Wrath...
Because she is the smallest legend.
Mind You she got even smaller hitboxes because of how she ran! Now she is running straightened up before the adjustment she ran like Naruto (lol).
One thing that You can utilize here to a degree is "broken" animations. Just move around like ShivFPS to minimize the probability of being hit.