Immolate can be really strong dps wise if you keep track of it and conflagute. in tbc and wrath we still use curses somewhat in raids but dungeons what not things affliction got kinda really buffed
specially in wrath so tbc/wrath that changes completely in fact in wrath of the lich king affliction spec is one of better dps specs in the game
classic wow affliction warlock doesnt exist where in wrath there S tier dps mostly because spell power added more dps to your dots. your dots can crit sometimes crit harder then shadowbolts scale so much harder in wrath compared to classic like no contest
not mention in wraith your drain soul spell is an execute deals got teir damage
really cant compare classic to wrath to different beast