It is said, thought and believed that Destruction is great at nuking important targets. Is it, though?
In Wod when we had to switch target, we would just use 4x Chaos Bolt and the damage of 4x Chaos Bolt was really juicy.
In Legion, we no longer have that big of a control with our new shitty shard resource. On top of that, we have to start with immolate so that's another ~1,5sec of time. On top of that, thanks to perfectly designed Mastery: Chaotic Energies spell Chaos Bolt will surely do zero damage if it doesn't proc and will do "ok" damage when it procs nicely. I feel like Choas Bolt isn't really Chaos Bolt anymore.
Yeah, sure, Conflagrate and Incinerate does some bigger damage than zero right now, but it takes time to cast those spells, right? Before you just could 4x Chaos Bolt and then worry about conflagrate / incinerates / shadowburn.
I mean, how exactly Destruction is good at burning down important targets in Legion? I can see that it's the only warlock spec that can do it, but just because it can do it doesn't mean it's good at it, right?
EDIT: Just for fun wanted to compare new chaos bolt to old chaos bolt. Before prepatch I used sandman+DSI and the weakest chaos bolt I got was 210k minimum damage (flask, rune, 125mastery food but no procs like weapon enchant or trinkets or ring). Just fought a dummy for 10min with same trinkets (DSI doesn't affect minimum damage now, but had to use it) and the minimum Choas Bolt I got was 76k damage with Eradication talent turned off. Imo, low numbers.