I think having the previous event stay in-game for a few days more just so people can exchange for rewards is a good idea

I missed out on all the rewards from ACPU Freeze cause I didn’t login before the maintenance started.

I think that having the previous event just stay in-game for an extra few days is a good QoL addition, just so everybody can get everything from the shop. Other Gacha’s also does this so why not NIKKE?