Your complaint is probably moot foot dragging. Companies aren't held liable for breaking a law that didn't exist at the time they released a product.

An ever-evolving game with properties of a SaaS would likely not exist under this new law.

Blizzard already knew how to build self-contained products with self-contained expansions even before WoW was released. StarCraft was the original game and StarCraft Broodwar was the expansion. It will affect game release cycles and properties of what you get with the game, but that's seems like part of the point of the legislation.