https://twitter.com/TheTruexy/status/1592572140603076608 (thread)
Changes
Base Stats
 Move Speed :: 325 >>> 330
 Base AD :: 50 >>> 53
 Base Armor: 20 >>> 24
 Base Health :: 600 >>> 630
 AS Ratio :: 0.568 >>> 0.625
 HP Per Level :: 109 >>> 115
Basic Attack
 Fully Charged Damage :: 90200 (+90%AP)(+115% target Max Health) >>> 90200 (+110%AP)(+115% target Max Health)
Living Battery (P)
 Gotta Zip Shield Bonus :: 10% multiplicative MS >>> 10% MS
 Duration :: 3s >>> 2s
Burst Fire (Q)
 Range :: 825 >>> 750
 Excess AS to AD Ratio :: 60% >>> 70%
 Base Damage :: 8/11/14/17/20 > >> 15/18/21/24/27
 AD Ratio :: 100/105/110/115/120% AD >>> 104/108/112/116/120% AD
Ultrashock Laser (W)
 Damage Type :: Magic >>> Physical
 Damage :: 20/55/90/125/160 (+ 100% AD)(+40% AP) >>> 20/60/100/140/180 (+ 130% AD)(+0% AP)
 Cast Time :: 2.5x Attack Time >>> 0.55s  0.3s (based on AS}
 Missile Speed :: 2200 >>> 2500
 Beam Cast Time :: 0.75s >>> 0.85s
Spark Surge (E)
 Mana Cost :: 80 >>> 90/85/80/75/70
 Cooldown :: 24/22.5/21/19.5/18s >>> 22/21/20/19/18s
 [NEW EFFECT] For the next 5s, Zeri’s Burst Fire does an additional magic damage to the first enemy hit and pierce targets.
 Bonus Magic Damage :: 20/22/24/26/28 (+20% AP)(+12% bonus AD)
 [NEW] Deals up to 65% bonus damage based on Critical Strike Chance
 Pierce Damage Falloff :: 60/70/80/90/100% >>> 80/85/90/95/100%
 Ability/attack damage reduce the cooldown of Spark Surge (E) by 0.5s (1.5s for critical strikes)
 Reveal Range Through Walls :: 850 >>> 1500
Lightning Crash (R)
 [REMOVED] Bonus Magic Damage
 Chain Lightning Range :: 450 >>> 650
 OnCast Magic Damage :: 150/250/350 (+80% AP)(+80% bonus AD) >>> 175/275/375 (+110% AP){+ 100% bonus AD)
 If R hits at least one champion, Zeri gains 10% Move Speed, 30% AS, and chain shots for 5s. Hitting champions refreshes this buff by 1.5s (up to 5s total).
 Hitting champions grants Zeri 1 stack (3 per crit) of Overcharge for 1.5s. Zeri gains 0.5% MS for each stack of Overcharge (stacking infinitely)
TL;DR
 Less squishy
 More damage early
 Q range decreased
 W no longer scales with AP and now does physical damage
 E now gives magic damage on hit and piercing Qs for 5 seconds (previously next 3 Qs)

R can only last for 10 seconds (previously infinite)R now gives bursts of MS instead of constant MS