When discussing whether the game is balanced - between attackers and defenders - you should realize that an alliance consists of several players and it is more important to set them up with the right types of players. In the end, it's not about how many stars a single attacker gets, but how they all perform.
If it's so easy to build up strong defenders, then anyone can do it to be successful in the World War, right? Sure, it takes time. But Domi is a game where you need patience. And as an attacker, it's sometimes enough to get just two or three stars if you have the right defenders in your team.
All attackers who are frustrated because they no longer get 5 stars in every fight should take a look at the overall setup of their team and consider how they can develop as a whole. There are so many possibilities.
One more point: Thanks to the manufactory, attackers now also have the chance to strengthen their defense without building up war weight. It turns out that pure defenders find it increasingly difficult to get stars from attackers. So attackers also benefit from the new defense options.
For me, however, the most important point is that changes in the balance between attackers and defenders are exactly what keeps the game exciting over the years. It would be bad if everything was always the same and predictable. Then nobody would care about details or good strategy.
The game is becoming more complex with more and more options and if you want to be successful, you have to take care of more than just the strength of your troops compared to the defense options.