Lets jump right in
It opens up different pathways for curation and deck construction allowing for more creative expression
Like most commands, you get to choose two modes out of four, create a copy of target Elf, return two permanents from the graveyard to your hand, destroy a creature or enchantment, or, the big one, give a players creatures +3/+3 and untap them
Mourning shifts seamlessly to celebration as she chooses her next suitor
We even have cards that don't exist yet on MTGO that could see play in the deck like Triumph of Saint Katherine from the Warhammer 40,000 Commander product
Its synergy with Ephemerate is still a particular concern for me, mostly because both cards are excellent by themselves, but together they are back-breaking