There are situations where the recoil damage from Abyssal Blade (and possible Unholy Sacrifice) do not trigger the recoil. Pride had some thoughts on what might be causing it.
Twitch clip example:
Also isn't Abyssal Blade supposed to use the Earth Slash animation, not Kiku?
No one has mentioned wanting to fix this and it's not something that would make me make a 2.03. The effect on Abyssal changed, as the range is no longer the cone shape from WotL.