To add something (vaguely) meaningful to the thread, Union is the avatar of my biggest problem with the ELH as a whole.
Epic play should feel different. It should be a different experience, with different (or at least additional) goals and methods. It should not feel just like lower-level play, only with the dial turned up to 11. Yet that's exactly how most of the book presents it.
Each power jump in D&D (low- to mid-level, mid- to high-level, high- to epic-level) should include both more and different. That is, some challenges are similar to what you already know, but more powerful, while other challenges are of a sort totally unlike anything you could handle before. Too much of the ELH focuses on more, with very little focused on different.