My exact thought
The article missed the fact that the treaty is rumored to establish "corporation can sue a state for lost profits due to changes in tax and environmental legislation" procedure.
So the concept is not entirely new - there are some cases of international corp vs state arbitration. The treaty supposedly streamlines it and makes it nice, easy and one way street for the corporations.
The opposite - states clawing back compensation for tax evasion, environmental disasters, etc from corporations in other countries signatories to the treaty is surprise, surprise - not supported. Same as the similar deal with the Eu.