Over the years we have seen Sah Spree of Sonan reworked multiple times, damage increased, yet I know 0 kunoichi who use it in pvp, let alone pve.

Please just make a new skill instead.

We have gotten so many damage buffs to the skill already to know it just isn't enough for us to use it.
While forward guard is an improvement, we would still benefit more from a whole new skill more than any rework of Sah Spree of Sonan

The devs said themselves at the heidel ball if they need to replace a skill they will, and I believe this is a perfect case where this is needed

Other skills for kuno:
(more to be added)
Ghost Step

I can agree to this, After playing kunoichi for 4~5 years, This skill needs to go, OR it really needs an upgrade/animation change if not, Just replace the skill. 
In the awakening kunoichi preview at the end where you guys showed the skills off in a combo, You (well not you specifically but the person who showed off the combo) didn't even use sah spree of the sonan so that kinda all ready proves it doesn't feel good in a combo.

But yeah its defintely a hard skill to implement in a combo.

Edit - This also applies to other awakening classes too, There is some skills that are just not viable and a waste of skill points, That needs to change or get replaced overall.

Issue is it lacks range, AOE, and protection, and despite having been buffed in damage 3 times it still doesn't do good dmg. And yes it 100% doesn't combo well with anything it honestly feels more like a left click attack than the actual left click attack tbh. But really though all rework I want to see on kuno right now is more protection on her dmg skills like shadow explosion, something to just completely replace ghost step (skill is glitchy and bug as hell barely works properly), and enough of these 20s+ CDs on all her skills.

Yeah, They did add frontal guard to sah spree of sonan in the global labs, But it's still not enough and getting mixed feelings from kunos. 
Shadow explosion does have an initial SA but yeah a lot of her kit needs tweaking/consistency, A lot of her pre-awakening feels mediocre besides shadow stomp and fatal blow, I can count flash slash (since it's a good skill) but... The initial animation can punish me real quick when I grind. Can't even use that skill comfortably when grinding.

Definitely, Lots of her skills just have a ridiculous cooldown for nothing when it's nothing even that powerful. I get the rebams, Some of them at least like the stealth ones, But the damage ones don't feel that crazy to have be 30 seconds. Granted most of her rebams don't cc too, At least not anymore. 
Shadow explosion, Black moonlight, and shackles, Are very underwhelming skills and honestly have a long cooldown doesn't make sense to me. Besides shackles cause of the movement speed debuff, But lets be real here so many other classes can do just that consistently and safely... 
I do want succession kuno to still feel special yes in pre-awakening but there are just some things that need tweaking that can be shared for both awakening and succession obviously prime version with succession can still differ in some respect. If they're gonna make awakneing kuno a high apm class for grinding and constantly go into pre-awakening they better make our pre-awakening feel viable.

Yeah on the topic of ghost step, So many skirmish classes can spam their i-frames comfortably. Meanwhile kuno/ninja have to try really hard to appear like we're i-framing but in reality we're vulnerable a lot of times. 
And I hate having to deal with desync and get a almost 2 second delay rather 1 (its normal cooldown). Yes get a better isp they said but lets be real, This happens to almost everyone and that split second of not i-framing cause of the lag 2 second cooldown makes you look dumb and gets you killed. I've had times I stood there in both grinding/pvp and get killed for that.
Also the distance covered with ghost step also sucks for grinding since some mobs are just bigger and harder to get behind, So we have to implement some 'unsafe' mobility to get behind and it's not even fast enough because they just turn around anyways, So much for backattacks. 

The thing I thought absolutely pathetic about kuno's Rabams perticularly about one of her newest ones "Shackle target" was how it basically a perfect copy of a ninja's already existing rabam "Illusion of Restraint", but it was much worest than the ninja verison in every aspect for no reasons, Ninja's has a larger AOE is a FG/Iframe, does 3x the dmg, but also only has a 24s CD compared to kuno's 30s CD. This just another example of why I think PA hates kuno they gave her a 3rd rabam that was a shitty verison in every way copy of an already exist ninja rabam than slapped a 30s CD on it, I have to ask why?