It will be a different playoffs now for the Bucks as Giannis can shoot threes now.
The question is, if he will be given a good looks, their opponent knows his capabilities, last playoffs the Raptors put good defense on Giannis but putting two defender on him and sometimes even 3 and that made him struggle, so as the whole team.
It still depends on how tight the double/triple team defense. If this could be very effective then you can definitely freeze Giannis. However this is a very risky move on the part of the opposing team because a wide gap of space will be created which can take advantage by his teammates especially their gunners like Middleton and Korver. But if you will not double team then he will get easily go through the basket. Hmm, for sure coaches from the other teams are now having headache in making strategies hahaha

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Like I said, it happened last year against the Raptors, they did a pretty good job of containing Giannis, the first two games Giannis was still very effective so the series started with 2-0 standing then after that, Bucks never win a single game until they got eliminated because they can't or they didn't adjust to the strategy employed by the Raptors.