A lot of things are too big honestly even with the camera pulled right back it can be incredibly tough to see what a boss is doing. It's been a long standing issue right back to the ivalice raids. Where that boss picks up a jar above his head and spins it. Even zoomed out you can't see which direction it's pointing unless you literally stand in his hit box and point the camera down..

And more recently I swear boss hit boxes are bigger than the arena they fight in. (Slight sarcasm)