The only one I've seen in Crucible and Iron Banner since the update is the Suros Regime. I don't really care if they are changed for PvP because I have Red Death and the Vex but I would like to see them improved for PvE. There's no reason they should be ineffective against thrawls.
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Id use suros in crucible if i could get rid of that annoying shoots slower perk (dps is a big factor for me) it seemed fairly decent untill I got that first perk -.-