I’ve not played H4 for a while.
Is there much difference?
Is it that better? Has the DMR thing been fixed?
I currently can’t play it as my arm is broken 
The DMR is still pretty powerful. But the bolt shot has been nerfed and friendly fire against vehicles has been removed.
Various and awesome playlists have been added as well as the majestic map pack (Great maps).
It’s defiantly better, but not perfect.
Broke your arm?
More video games, less physical activity ; ) Safer that way.