Got to say that I didn't expect the "new" slayer cards released during 1rst half turned to be "old" for this 2nd half, and thus removing previous slayer cards like Akie from the scene.
I mean, I don't know if I remember correctly, but slayer cards lasted the entire event last time.

IMO this situation impacts the worth of spending money on event gachas for those slayer cards. Now the money spent on those cards has less value since the effect last shorter.
I think this move is clearly targeting whales who can afford replacing slayer cards twice per event. And let's not forget about puddings..

I take my words back. Nutaku isn't being nicer, is just trolling us nicer.