Spring Cleaning patch.

6.81b is here:

 Spoiler

Ancient Apparition
* Ice Vortex slow decreased from 18/22/26/30% to 15/20/25/30%

Batrider
* Sticky Napalm bonus damage is now halved against non-hero units

Bounty Hunter
* Shadow Walk duration increased from 15/20/25/30 to 20/25/30/35

Doom
* Devour manacost rescaled from 60/50/40/30 to 60

Drow Ranger
* Gust knockback duration increased from 0.5 to 0.6/0.7/0.8/0.9

Earthshaker
* Turn rate improved from 0.6 to 0.9
* Echo Slam's Initial Damage, Echo Search, Echo Damage AOE increased from 525, 550, 500 to 575, 575, 575

Elder Titan
* Echo Stomp damage increased from 80/85/90/95 to 80/90/100/110

Enigma
* Midnight Pulse duration increased from 8 to 11

Invoker
* Forged Spirits 33% magic resistance removed
* Cold Snap damage reworked from the initial and secondary proc damage of 60/30 to 7xQuasLevel per proc
* Deafening Blast's Disarm is now dispelled when Magic Immunity is applied

Juggernaut
* Omnislash damage per slash rescaled from 175-250 to 200-225
* Base Attack Time improved from 1.5 to 1.4

Leshrac
* Pulse Nova damage increased from 66/100/144 to 80/120/160 (Scepter from 100/150/200 to 100/160/220)

Lina
* Light Strike Array stun duration increased from 1.6 to 1.6/1.7/1.8/1.9

Lycan
* Howl duration decreased from 12 to 10
* Howl bonus damage reduced from 20/30/40/50 to 14/26/38/50

Mirana
* Sacred Arrow minimum stun duration decreased from 0.5 to 0.01 (maximum duration is still 5 seconds growing linearly)
* Sacred Arrow minimum damage reduced by 40 (maximum damage is still 190/280/370/460 growing linearly)

Ogre Magi
* Multicast's passive manacost penalty on Fireblast reduced from 30/70/110 to 20/40/60
* Bloodlust can now be cast on Magic Immune allies

Omniknight
* Degen Aura slow increased from 7/14/21/28% to 10/18/26/34%

Phantom Assassin
* Phantom Strike bonus attack speed increased from 100 to 130

Queen of Pain
* Shadow Strike cast range increased from 435 to 450/475/500/525

Riki
* Smoke Screen cooldown reduced from 13 to 11

Skywrath Mage
* Ancient Seal damage amplification increased from 18/24/30/36% to 30/35/40/45%

Slardar
* Bash bonus damage increased from 40/60/80/100 to 60/80/100/120

Treant Protector
* Leech Seed damage per pulse decreased from 24/36/48/60 to 15/30/45/60

Tusk
* Snowball cooldown reduced from 21 to 21/20/19/18
* Walrus Punch cooldown reduced from 30/24/18 to 25/20/15

Undying
* Intelligence growth increased from 2.0 to 2.5

Windranger
* Focus Fire manacost decreased from 150 to 75/100/125

Zeus
* Lightning Bolt vision and truesight duration increased from 3 to 4.5
* Lightning Bolt search area of effect increased from 250 to 325


ITEMS

Mjollnir
* Recipe cost increased from 600 to 900
* Static Charge duration decreased from 20 to 15

Some good changes in there.
Bat should still be good, but not god of base defending.
Ogre magi might be legit.

And much more, especially juggernaut changes look legit as pineapple.