It would be nearly impossible for BioWare if they had to make every planet area as big as the planet itself, WoW is a world but not an entire galaxy like SWTOR. I see SWTOR as quite big like on Nar Shadaa, it seems very big but isent, but still i get the feeling of it being big. Btw if you havent tried to run out of fatigue in WoW, you just havent explored enough, even WoW got limits when it comes to being an sandbox.