With recent changes to wall of elements and volley, will people still use vMA weapons on the backbar or switch to something else in PvE?

Patch notes

Volley:
This ability and its morphs now deal damage every second, rather than every half second, and increased the damage per tick by approximately 11%. This will result in an overall damage loss.
Reduced the base cost to 2808 from 3510.
The range on all morphs is now 28 meters.

Arrow Barrage (morph): This morph no longer extends the duration, but increased the damage per tick by approximately 20%.

Endless Hail (morph): This morph no longer grants cost reduction, but now lasts 9 seconds and ranks to 12 seconds at Rank IV, rather than gaining 1.1% damage per tank.


Wall of Elements:
Increased the duration of this ability and its morphs to 8 seconds from 6 seconds.
These abilities will now rank up in damage per rank, rather than cost reduction.
Decreased the cost to 3024 from 3510.
Decreased the damage per tick by approximately 33%.

Elemental Blockade (morph):
Increased the duration from this ability to 9 seconds from 8 seconds, which ranks up to 12 seconds. It also no longer reduces in cost per rank.

Unstable Wall of Elements (morph):
This morph no longer reduces in cost per rank, but increases in explosion damage.
Increased the damage of the explosion by approximately 94%.
Fixed an issue where the final DoT tick was being consumed by the explosion.