I realize this is maybe kind of a sensative time to bring up his point, but Lucus nailed the problem with running simple removal spells in gold slots years ago.
Everyone else and their mother sucks up the mono-colored removal spells, which is fine, unless you're a control deck, that needs efficient removal more than those other decks do, while also having to get its other components. The threat decks dilute the total efficient removal pool, putting the control player in an awkward spot. So than the cube designer goes and tosses in a bunch of gold removal spells to float around at the end of the pack.
This sounds ideal on paper, but in practice, those gold removal spells are always clunky 3 mana spells. They trade inefficiently, and worse, they make it where if the control player wants to have the basic foundation for their archetype, they have to move into 3 color decks all the time. You get these clunky 3 color control decks, running 3 mana non-conditional removal spells, hemorrhaging tempo on every ETB threat.
That sucks, and its just another reason why you're better off focusing on threats, rather than answers, in a lot of these cubes, which you may or may not care about depending on how you feel about hard control.
And this also touches back to what ahada mentioned too, about gold cards carrying a bigger inherient commitment, and they should reward that commitment, rather than being awkard, bottom picks.
Im sure its ok to run an extreme handful, especially if you're struggling to find space for artifact/enchantment removal, but it can get out of hand real quick.