With current physics engine it will cause way too much load for the players + putting stuff like ragdoll physics is not something Square-Enix would do to their title game Final Fantasy, they praise their graphic quality so much they would never allow it imo.

Now in few year as technology advances we may see something like this in future MMO's/Square-Enix titles but with FFXIV I doubt it's gonna happen even if its in 2.0