I will tell you why you don’t know wtf you are talking about.
First of all, what you are complaining about is not demonic not being impactful, and demonic is not a maintenance buff in the same way that slice and dice is. When you have eye beams up you wanna use it anyway, you’re not actively thinking about keeping meta up, all you’re doing is just your rotation, and trying to stay on target as much as possible.
Demonic is one of your strongest talents in terms of damage, and in terms of gameplay it provides metamorphosis, which has an actual effect on your rotation.
So what you’re complaining about is actually “it’s not doing as much burst as i want to”.
The problem is, demonic is not meant to be a heavy burst button, it’s meant to be a short burst window, that you get regularly.
The removal of cycle would simply make the spec less dynamic to play. It’s also not necessary because there is a way to provide burst damage without removing cycle. And that is essence break. They could simply add glaive tempest to essence break, and increase the duration.
They could also change first of the illidari so it provides actual burst inside of your meta window.
And this is the difference between me and you, you and people who think like you have a mentality of removal, i have the mentality of finding solutions that are actually fun to play with.
And this is the actual problem, the problem is that, it doesn’t matter how good of a player you are, or you think you are, just being good doesn’t mean you’re a good designer.
You people are always thinking about one thing only, how to maximize dps, while completely forsaking actual gameplay.
If blizzard listened to people like you, all specs would lose dynamism, they would all become static, boring, completely predictable garbage that is wholly unfun to play.
Just so you have the perception that you are squeezing out every ounce of dps that you can.
And this is exactly why i hope that no matter how good you are or you think you are, blizzard will never listen to people who think like you.