I see a lot of people say MOP destro was amazing, I feel like there were aspects of it that were great like shadowburn sniping... but charred remains was a bit much, i'd rather have a really powerful chaos bolt that a million meh ones. There were some OP talents though like Kil'jeadan's cunning and Mannoroth's fury...
On topic, I feel like affliction is kinda boring sometimes but overall it's still decent. Destruction is a bit more engaging I wish it had a BIT more mobility, although planning movement can be fun. Demo just feels outright rigid, but it can be interesting.