Dynamo Rollers
Dynamo Roller: When flinging ink, the central zone in which an opponent can be splat, is decreasing by 18%.
Gold Dynamo Roller: When players attack the Rainmaker’s Shield in Ranked mode, damage is increasing by 12%.
Tempered Dynamo Roller: Ink recovery time after a fling attack is increasing from 1. 17 to 1. 33 seconds.
For the Dynamo Roller and Tempered Roller, these will be considerable nerfs.
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Special Weapon Effects:
Bubbler: Without any gear buffs, the base duration of the special will decrease from 5. 0 to 4. 5 seconds. Furthermore, the maximum duration buff from gear abilities will increase from 40% to 60%.
Kraken: The base duration of the special will decrease from 6. 0 seconds to 5. 0 seconds. Additionally, maximum duration from added gear buffs is increasing from 40% to 60%.
The Kraken has been nerfed in previous updates, and it is unclear if this will be the final nerf.
[Source]
The latest Splatoon update promises to balance gameplay experience. It is unclear, however, how many further updates the game will receive, considering the recent announcement of the very last Splatfest.