u/North_Stress_6055

26.20 has been live for a few days, so I dug into the data and here's how the buffs and nerfs from the patch notes actually played out:

Champions

Champion	Change	Winrate 26.19 → 26.20	Diff
Bard	Meep AP ratio 50% → 67%; Meep recharge 8s → 5s; Meep damage per 3 chimes 6 → 10	41.5% → 48.8%	+7.3
Thresh	Passive souls 2 → 3; W cooldown 21–17s → 19–15s	43.0% → 50.2%	+7.2
Lee Sin	Passive attack speed 40% → 50%; passive energy +10; W shield 60–240 → 80–320; Q2 damage 60–180 → 80–240	41.3% → 44.6%	+3.3
Swain	Damage taken 105% → 100%; healing 95% → 100%; soul fragment restore 6% → 3–6% by level	48.4% → 50.7%	+2.3
Garen	Passive regen up; W cooldown 22–12s → 18–12s; W shield 18% → 20% bonus HP; W stacks per minion 0.4 → 0.75	45.2% → 46.0%	+0.8
K'Sante	W cooldown 14–10s → 10s; W damage reduction 30% → 45%; E shield 13.5% → 15% bonus HP	42.0% → 41.2%	−0.8

• Thresh and Bard went from bottom tier to average.
• Lee Sin is clearly better but still near the bottom.
• Garen's buffs didn't move his winrate.
• K'Sante is picked ~30% more after his buffs, but his winrate did not improve overall.

Augments

Augment	Change	Winrate 26.19 → 26.20	Diff
Juiced	Damage-to-mana ratio 4.5% → 7% (80% for ranged); no longer drains mana	45.9% → 48.1%	+2.2
Squishy Slappy Grab	Cooldown 35s → 30s; damage 30–100 + 10% bonus HP → 50–150 + 15% bonus HP; shield 35–150 → 50–200	46.6% → 48.2%	+1.6
Shark Tempest	Slow 30% → 40%; area damage 50–100 → 100–200; attached damage and ratios up	47.0% → 48.4%	+1.4
Triggered Inferno	Cooldown 15s → 5s	46.9% → 47.6%	+0.7
Leg Day	Slow resist 40% → 50%	50.1% → 50.2%	+0.1
Spell Split	Splits at missile end or on recast instead of on first hit	47.8% → 47.3%	−0.5

• Juiced nearly doubled in pick rate and is greatly improved on many ADCs: Kai'Sa 40% → 50%, Jinx 40% → 54%, Kog'Maw 39% → 49%.
• Squishy Slappy Grab climbed out of the bottom tier but is still below average.
• Triggered Inferno's 15s → 5s cooldown barely moved its winrate.

Bug fixes

Ivern + Minionmancer has the biggest winrate jump of any bug fix. Minionmancer's damage amp now applies to Ivern's R (Daisy), and Ivern with Minionmancer went from 44.3% → 49.1% (+4.8).

Source: MayhemMeta