This change is insane. Please revert it. Scourge is almost consistently kitten in terms of damage potential with every patch but this one is just way too severe specifically because of ruining synergy with Sand Sage and Sadistic Searing. Mobs aren't static in this game, especially in use cases where it remotely matters like T4 Fractals. Having less than as many shades up as possible constantly is hamstringing your DPS as scourge. Now you are punished for trying to pursue that synergy - mob moves out of your shades? Congratulations, you're screwed and a gigantic chunk of your damage just evaporated. We need the ability to act as an additional shade for the purpose of pursuing mobs and even if you want to argue the support focus angle, great, hope you enjoy denying your allies that condi cleanse or little bit of barrier that would've helped them because they're a metre away from your shade.
It feels like you intrinsically gave the ability for Scourge to deal DPS and now you're trying to hammer it into those of us who like the playstyle that we're wrong. It sucks, taking away the little flexibility we have is excessively punishing. We can't even destroy shades so if we're out of them and the mob runs off we can potentially be waiting twelve or more seconds contributing next to nothing to our teammates. What the hell am I supposed to do in Snowblind now? Shaman leaps so I get to spend a quarter of a minute twiddling my thumbs saying 'sorry I'm dead weight again guys'? Situations like that aren't at all the exception either - that isn't even taking into account how many people obliviously knock mobs out of your shades. This is the most damaging update in a single patch Scourge has ever received, worse than the bug on launch, nerf to compensate or the bug being fixed and nerf never reverted.