Can I have a link? I've actually explored quite a bit in GSC, it would be interesting to read this kind of information.

It's a dull and uninformative presentation, incorrect in many ways.

Regarding "ate the value" - that's nonsense, nobody eats the value; it is evenly spread across the respawn with the density specified in the rmg. The presence of a Dragon Utopia on the respawn simply means that a Dragon Utopia was generated from the higher range (10K-15K), which does not affect the lower ranges. If the respawn is small, there is usually 1 object from the higher range on it, most often a Dragon Utopia/hive+something/major+something/6-7 dwells+something.