Would this be a good Evelynn Rework?

Passive: From the Shadows: Evelynn's spells grant her a stack of Shadow's Grasp, when 4 stacks are reached, the target takes X bonus magic damage and Evelynn is healed by that amount.

Q: Hatespikes

Same as live, base damaged buffed slightly, missile speed reverted back to original. Now scales only off of AP again.

W: Shadow Walk

Passive: Evelynn's spells grant her X/X/X/X/X movement speed, caps at 4.

Active: Evelynn bends the shadows at will, making her only visible to true sight and nearby enemy champions for X/X/X/X/X amount of seconds. While stealth, Evelynn ignores unit collision, gains increased mana regen, and her next attack will deal bonus damage based on the targets current health.

E: Ravage

Evelynn slashes her enemy twice in quick succession. If Evelynn has 3 stacks of Shadow's Grasp, Ravage will consume the stacks and send her into a frenzy, increasing her attack speed by X/X/X/X/X for 3 seconds.

**R: Shadow's Beckoning ** (650 range)

Evelynn summons tendrils that latch onto an enemy champion, allowing her to dash them, and deal X/X/X(X*). If the target is killed, the cooldown of Shadow Walk is reset and Evelynn gains X/X/X% increased movement speed decaying over 3 seconds.

Now let me break down the kit for you: Her passive now gives her sustain in the jungle and helps a bit with her clearing.

Her Q is the same, just much faster and scales only off of AP.

Her W is like her current passive, but it is limited and now gives her a bit more oomf when ganking making her next attack do bonus damage based on the targets current health.

Her E maintains her live function, but instead of free attack speed, she now needs to make sure she has 3 stacks saved up for it.

Her R makes her an assassin again, allowing her to dash to a target, and then resetting her W CD while giving her MS to run away after she's gotten her kill.

Let me know what you think! Too OP, too UP?