I propose that the Powers rule reading:

Deities start with no Powers, but may create a new Power by spending 1 Quintessence and constructing a new Power from a combination of the components listed below, and giving it a name of their choice. Each component has a Worship or a Might cost - a constructed power must have at least as much Worship as Might. If a Power uses any Global Might, it must also have at least as much Global Worship. A Power may only contain one instance of each component.

be changed to read:

Deities start with no Powers, but may create a new Power by spending 1 Quintessence and constructing a new Power from a combination of the components listed below, and giving it a name of their choice. Each component has a Worship or a Might cost - a constructed power must have at least as much Worship as Might. If a Power uses City Might, either Global or City Worship may satisfy the requirements, whereas Global Might may be supplied only by Global Worship. A Power may only contain one instance of each component.

Unless of course my interpretation is wrong, or perhaps this could lead to easier abuse of Powers.