It's not nerfed, the frequency of the damage has been increased with each hit decreased.
Wrong. When I tried it out in pvp this morning, it was doing about about 3 ticks at 600 pts of damage per tick. Before it would do between 1k-2k per tick.
This is in full BM gear. This is also with the overall damage increase due to the added expertise on BM gear.
In the same game where DFA was hitting for almost nothing, I was having HS missile hit for over 5k all over the place.
The radius reduction makes the attack pointless, as you are not able to even cover the full area around a cap point anymore.