There was, in fact, a prize fight for eliza a few weeks ago, post-hard launch, where one could obtain an In Denile (bronze) Eliza, Scarlet Viper (silver) Eliza, and Diva Intervention (gold) Eliza
what i've seen is that when i switch out a sm/bb, and then equip a new one, after one match the new sm/bb moves to the last slot and every other previously equipped one moves over to the left 1