I've been to most of the places he said were bad and I totally agree that you can ignore what he says. Shortly after talking about how bad Zion is for the crowds he says that Capitol Reef is also terrible. I thought Capitol Reef was great. It's a lot like Zion but without the crowds.

He also dismissed a few parks that I think are ideal for families with young children. Petrified forest has lots of interesting short hikes that you can do with small children. They also have a really nice ice cream shop with great views. The fact that you can do short hikes to amazing views is part of what makes Arches nice. If you want a longer hike drive next door to Canyonlands which is also fantastic.