You obviously never played back when Eve had a stun and lost it in favor of a slow.
She was flat out butchered and a troll pick for 1 year.
Hate Spike
Missile speed increased.
Shadow Walk
Will now apply a 30 / 35 / 40 / 45 / 50% slow for 3 seconds instead of a stun for 1 / 1.25 / 1.5 / 1.75 / 2 seconds.
Malice and Spite
Health restored reduced to 150 / 225 / 300 per kill or assist from 350 / 500 / 650.
Attack speed bonus reduced to 25 / 50 / 75% from 50 / 75 / 100%.
Eves old kit was...
Determined Killer
INNATE: Non-neutral minions deal 50% damage to Evelynn.
Hate Spike RANGE: Melee COST: 12 / 15 / 18 / 21 / 24 MANA COOLDOWN: 0.8
ACTIVE: Damages the closest enemy unit with a lightning fast bolt of energy, dealing magic damage and 50% damage to a secondary nearby target.
MAGIC DAMAGE: 25 / 40 / 55 / 70 / 85 (+ 28% AP)
Shadow Walk COST: 60 MANA COOLDOWN: 12 / 11 / 10 / 9 / 8 after breaking stealth
ACTIVE: After 1.5 seconds, or after 5 seconds if Evelynn was attacked, Evelynn fades away, becoming stealthed. Evelynn's next attack or ability will slow her target for 3 seconds, ending her Shadow Walk. Evelynn can cast Shadow Walk again to destealth.
STEALTH DURATION: 10 / 20 / 30 / 40 / 50 seconds
SLOW: 30 / 35 / 40 / 45 / 50%
Ravage RANGE: ? COST: 90 / 105 / 120 / 135 / 150 MANA COOLDOWN: 9
ACTIVE: Deals magic damage to the target and reduces the target's armor and magic resistance by for 5 seconds.
MAGIC DAMAGE: 80 / 135 / 190 / 255 / 320 (+ 100% AP)
ARMOR AND MAGIC RESIST. REDUCTION: 10 / 14 / 18 / 22 / 26
Malice and Spite COOLDOWN: 90
PASSIVE: Evelynn revels in the demise of champions she has aided in killing, healing her upon their death.
HEALTH GAIN: 150 / 225 / 300
ACTIVE: Evelynn gains bonus attack speed and bonus movement speed for 10 seconds. If Evelynn scores a kill or an assist, this ability's cooldown is refreshed.
This ability can be cast while stealthed.
ATTACK SPEED BONUS: 25 / 50 / 75%
MOVE. SPEED BONUS: 20 / 25 / 30%
Edit: changing some wrong information, adding what the nerfs were and her old kit for clarity.