HERE is the list for 6.53 changelog...take a look.Ive look through it and highlighted a few important updates..
* Improved Drow’s Marksmanship slightly
* Increase AOE on Dispersion
* Lowered Soul Keeper’s base movement speed and increased cast point* Improved Stifling Dagger
* Improved Open Wounds a little
* Decreased Mana Void’s cooldown
* Lowered Infest manacost
* Fixed a minor bug with the order of the heal and damage operation on Purification when combine with Aphotic Shield on a nearby enemy
* Fixed a bug with Magic Immunity and Haunt
* Fixed a bug with Song of the Siren and Berserker’s Call
* Fixed a bug with selling Aghanim’s Scepter
* Fixed a minor bug with Soul Assumption and buying items
* Fixed a bug with Magic Immunity and Strygwyr’s Thirst
* Fixed Berserker’s Call interaction with Neutrals at night
* Fixed Stout Shield hotkey conflicting with Kelen’s Dagger in the Goblin Shop
* Fixed a bug with Shackles and Berserker’s Call
* Fixed a bug with Magic Immunity and Sand Storm
* Fixed Mana Leak to not trigger off of Exort/Quas/Wex
* Fixed -ah for observers