In many ways, its like the Five-Color Humans decks are built like the old Five-Color Control decks built around Vivid lands and Reflecting Pool, except all their lands enter the battlefield untapped
Im not sure exactly how this deck would compare to G/R Aggro and U/R Delver, but theres something to be said for a pristine mana base and an abundance of burn
Omo, Queen Of Vesuva Omo, Queen of Vesuva's power comes from the ability to give your lands every land type
On the flip side, Emeria, Shattered Skyclave is just a land that taps for white mana, making it a flexible inclusion in white-heavy decks that want power and consistency in one card slot
Sure, theyre still on the board, but with no ability to attack, block, or activate abilities, they might as well not be in most cases
So you're not really ramping after all - your extra mana is all too fleeting, which is what makes this a red ability