One major change many players will be happy to see is the rework to Resistance calculations that now has them stack additively instead of inverse multiplicatively. Previously, stacking Resistances had diminishing returns which discouraged players from utilizing multiple affixes of the same Resistance. However, now Resistances stack additively, meaning players will be able to reap the Diablo 4 Gold full benefits of stacking multiple affixes of the same Resistance type up to 70%, bringing the functionality of Resistances in Diablo 4 more in line with how they worked in Diablo 2.
Several Diablo 4 classes have also received buffs with this update, which should help diversify the number of viable builds in Season 2. The bonus damage Barbarians deal while Berserking is now multiplicative instead of additive, meaning they can achieve higher damage output using skills like Wrath of the Berserker, and the Sorcerer's Hydra skill has received a significant damage increase from 12% to 60%, making Fire Sorcerer builds viable again. The biggest class buff in this update goes to the Necromancer, who receives a variety of buffs to their minions, making a Summoner Necromancer build potentially one of the class' best options this season.
It's a great sign to see that the majority of changes in this update for the Season of Blood are positive gains for Diablo 4, but there are a few changes that may be controversial as well. The biggest change to note here is the overhaul of Critical Strike, Vulnerable, and Overpower Damage which changes these stats to being additive instead of multiplicative cheap Diablo IV Gold. The result means each of these damage types now only stack additively with one another just with different trigger conditions, which will end up reducing the overall power of Critical Strike and Vulnerable Damage to account for them being too overpowered in the past.