The problem with that setup (speaking as someone who played in the same group as a binder), was that it seemed totally random and arbitrary unless you'd read that writeup.
Truth. I absolutely loved the Tome of Magic vestige writeups --- bizarre, flavorful, and oftentimes firmly grounded in D&D lore --- but it led to a weird suite of powers for each vestige, and a lot of strange behavior. Took up a lot of space, too. I hope that fluffy article happens, but I can understand the reasoning behind keeping things simple.
I imagine that some of the old ToM vestiges are an odd fit with the revised cosmology, but I suppose that's a hook in itself --- carrying over concepts from earlier editions of the game is strangely consistent with the notion that vestiges are entities that fell between the cracks of the universe. All of your older brother's old Basic D&D Immortals are now vestiges, baby.