I only recently earned the catalyst for SUROS Regime after someone pointed out a particular detail to me. Currently, the catalyst says "Earned through victory in the Crucible" which basically means just complete Crucible matches to have a chance to earn the catalyst, regardless of winning or losing... nowhere does it say that SUROS Regime must be used during said matches in order to earn the catalyst. For those who are wondering why they haven't unlocked the catalyst for it yet, equip SUROS Regime and keep playing matches as you use it. Bungie really needs to update the unlock description in order to avoid further confusion with newer players, because I don't want them to have to go through several Valor Rank resets before they realise they need to use SUROS during the matches. Now, if you'll excuse me... I need to work through the meta and earn kills with SUROS Regime.