Outlaw/Combat has always been better for aoe than st. Which makes them better in 5-mans than raids. Fortunately we live in the age of M+ where 5-mans are more relevant. In raids, we will do better in fights with lots of adds than those without. I've only just leveled my rogue alt, not played since WoD, so haven't raided Legion on him yet, but I'm guessing our better fights would include Skorpyron, Tich, and Botanist? And we probably fall off for Krosus, Star Auger, Elisande... Spellblade we could be good for frost phase where the adds clump but not so good for fire (except maybe with acrobatic strikes?). Just my guesses based on previous xpacs.
I dinged 110 today and started gearing. Guess I'll find out soon enough!