She fits perfectly in the new Jewelry Bonney deck, but she can also have a place in good ol OP01 Trafalgar Law
As for the effect of (3), I think it's excellent that you can search for your favorite "Armed Dragon" card by using this card for the hand cost of various "Armed Dragon" monsters
The Flamberge's steep cost of needing an additional discard makes this tech most suitable to decks that really like cards in grave or have access to virtual card advantage, like Turbo Chaos or Bazoo Return
Typal decks are really popular, especially in Commander, so WotC is always releasing new typal cards to strengthen the existing archetypes or to create new ones entirely
(2018-10-05) Price of Fame can target a creature that's indestructible
That means cutting cards that dont cleanly fit into either role, or which are redundant versions of effects we have already graveyard decks can easily access huge chunks of their library each game, so variety is more valuable than depth