In my opinion the mistake was to shift the meta towards sith way too early with Palp and Vader reworks. They were op for months with sion and nihilus before traya even appeared. Then Traya finally got there and they need to keep her at the top long enough, which means again months of op sith meta.
They basically chained two sith meta instead of giving us some diversity in between or simply wait for Traya before reworking palp and vader.
It feels to me like siths have been op in arena forever now, and it’s not even the end yet.
