This DLC is the best way to explain what Democracy 3 is all about: experimentation. Some people are so focused on "winning the game" that they miss the point. You don't "win" the game, you set yourself an objective and then experiment to get it done.
It's a strategy game. You have an objective and then develop a strategy to achieve your goal. Simple as that. The policies in extremisim are an additional challenge for which you must plan carefully. You just can't pull some extreme policy right away and not expect some backlash. You need to work your way up there.
This game really is a sandbox and the Extermism DLC just opens up more doors to this. The game doesn't tell you "you should do this or that", the game just gives you many path to achieve what you had in mind in the first place. Highly recommended.