“We’ve decided to modify the poison mechanic in a few ways, and introduce tools to let dexterity-aligned attack characters use and specialize in poison without having to use daggers or a limited set of unique items,” the studio said.
Among the changes to poison include the ability to stack, a restriction to just chaos and physical attacks, the addition of a poison support gem, and the inclusion of more passive skills to support the mechanic.
Source: Official forums