Order 66 Raid

Wtf happened to the Order 66 raid? Ive been doing it the same exact way with r7 tarkin and clones and r9 scorch on the r5 difficulty. I would get it first try every time and now it takes me 20 tries to get max score. This is absolutely ridiculous. Why the hell would you change something almost a year after releasing it?! Im so sick of this BS CG get your s**t together.