One-Turn Kill (OTK) or counterattack scenarios are becoming increasingly prominent in the BT-06 meta, with a variety of top-tier decks running cards that can deal large security damage within a turn. This is amplified by that fact that memory can now be accumulated (using delay option cards).
Suddenly, the very underplayed [BT5-044] Sakuyamon may receive a little but more attention. By debuffing the security checks of your opponent's Digimons moving out from nursery, she destroys the very engine that made those decks top-tier. Coupled with strong board control (that yellow decks have an abundance of) it is possible to almost completely lock your opponent's counterattack engine.
I tested her with shinegrey in this meta. Must say she work wonder against the above deck. Likely also because shinegrey can strike back the unit if they stay on the board.