shadow will suck again. why? i look back at 13 years of wow (praise the lord not 13 years as a spriest). i NOWHERE see either a top dps class, nor an aoe viable class. besides some really short moments, mostly of false game design (S2M 7.0 says hello) i see „fine spriest“ in history of wow. ofc, long ago spriest was a good mana battery. yeah. but, seriously: NO.
or in short: you had never been and will never be a competitive class to rogues/locks/mages nor you will ever not suck in aoe. 13 year wow history tell you why.