Diablo 2's last patch to make changes to class balance was 1.13c, released on March 23rd, 2010. Now Diablo 2: Resurrected is getting new tweaks to class balance, as explained in a Blizzard blog post. Ladder rank play is also on the way in early 2022.
The post says that the changes to classes are being made "to expand character build diversity, and retain class fantasy and specialty." Without drilling down into the specific changes to come, they then talk about the philosophy behind each class
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