Honestly? Sera M1 wasn't the problem before the fact, but is annoying to some players nowadays.
Lucy and Nabrissa have almost always been the problem children along with Diana.
Taking Diana means the 4* lineup is weakened, and taking Sera M1 means that Diana will just get banned by players more, so I think staff is trolling, or at least I HOPE they are.
Page 13 , Post 121
(From Espectroscuro )
Pussycats : This clan is a powerful defensive one but now it has good offensive cards too. Here we proposed an exchange between Clover en Lucy to weaken a little more the base of Pussycats by one star. Well it seems that doesn't work for players, I was asked to ban Sera M1 instead.
I kinda' agree.
But then again, I could say the same for SOA / SOB decks.
Or Mono La Junta.
All you need to do with La Junta is win 2 rounds, sometimes only 1 and can threaten to 2HKO almost every round .
And SOA / SOB Decks just need to wall one or two hits , then crush you on the offensive.