The sword is not shown floppy. The weapon is not called a sword in the first place. It is a flexible blade and slightly longer than a scimitar sword (Talwar). It was a traditional Maratha weapon also used by the brave Baji Prabhu Deshpande. It requires very good practice to use it. But once a soldier was used to weilding it, the weapon could cause mayhem in the enemy ranks.
SLB created a very magnum canvas. Hope the story & script will match the same. Else the non-sensical rohit shetty & pathetic SRK will steal the lime-light again by idiotic entertainer i.e. dilwale.