Affliction is the best DPS spec right now yes, falling dismally behind other classes but it's currently the best option. Jenova's wild claims aside, getting destro to compete with Affliction is currently impossible; it just doesnt work out mathematically. With Pandemic, Haunt and Shadow Embrace DoTs are doing more damage than ever; Destro is stuck with passive improvement talents and the iffy Chaos Bolt for DPS increase. Fire and Brimstone actually works out NOT worth the points investment.
I'm not sure what you're talking about, Jenova, when you refer to Destro rotations. You only have four spells to use and their usage is sharply dictated; Chaos Bolt, Immolate, Incinerate x whatever, Conflagrate. There is no more complex rotation than that, it's just plain old rinse and repeat. Chaos Bolt by the way is NOT the highest-damage single-target nuke in the game because talented it remains much poorer than the normal spells Mages have. Talents don't improve Chaos Bolt very much but they do improve Fireball etc. It's not all about the base numbers. Back in early beta when it would cut through a Paladin shield it was a great spell; now it's just another minor % increase gimmick that can get you locked out of both trees