Make First Blood baseline.
Enough said
Add more rotational abilities
BUT that are not Fel Rush. eg. make Felblade baseline so there is something that changes our rotation. Bring back Bloodlet. These are just some suggestions so the spec is not dead boring and 2 buttons.
Add some synergy between abilities.
e.g. Make Throw Glaive put a debuff on the target that increases Blade Dance damage. Make Eyebeam or Demons Bite put a debuff on the target that we can detonate with Throw Glaive. Anything, just something to do instead of just spamming Chaos Strike.
A lot of this has been said before. Just adding my voice. I came up with these in 2 minutes so they are not perfect, but PLEASE just do something so I can keep playing this class and still have fun. It is mind-numbing at the moment. I just hate that a character I am invested should now be dumped because I pretty much just press Demons Bite and Chaos strike.
Also notice that I am not asking for uber damage or anything, just something that I can have fun playing. Seriously. Please.