If your opponent has this card, youd want to defeat Neo Exdeath [12-110L] before the ability kicks in, but the second ability, When Neo Exdeath is chosen by your opponents Summons or abilities, your opponent selects 1 Character they control
There are a few permanents that offer more doubling up of counters, as well as ones that save counters from removed creatures, but even without these, Counter Blitz is very powerful right out of the box
Klomparens explains that the change of dates is not motivated by the impact of Vivi Cauldron, but because "we got our banned and restricted announcement timing windows wrong during this part of the year." The situation, however, doesnt change how the rotation of cards in the Standard format works
In my opinion, it requires too much support to really pop off, and we just dont have the ability to do that in Limited