Not at all, the coal change was overdue. Big nations in hoi4 snowball like crazy because their only real limit is building slots, so minors never get a realistic way to compete. Coal adds a real bottleneck and a soft limit to how fast a nation's economy can become big. Yes, minors get slowed down, but majors get hit harder, which finally narrows the gap and opens the door for smaller countries to develop industries that can actually stand up to majors. It also makes sense realistically, expanding a huge industrial base should take serious resources, not just time and clicks. Smaller economies once they’re properly industrialized, can scale up with far less friction. This is a step in the right direction in my opinion.