Grinding Gear Games will change the Lightning Tendrils skill gem visuals. As Grinding Gear Games stated, this will slightly change the mechanics as well. These changes will be applied in the 3.1.0 update.
The update won’t change other lightning fixes to other lightning skills despite the lightning tendrils. Therefore, players might begin to do lightning tendrils builds. After the update applies, Lightning Tendrils will finally feel like an actual channeling skill, including such an improved animation.
Lightning Tendrils will let players to smoothly change directions towards enemies in different positions. On every fourth pulse, it deals more damage which makes it more powerful over a longer casting time, considering it as a better attack against tougher foes. You can watch the Lightning Tendrils skill rework in the video below.
Grinding Gear Games have been developing such an amazing and free content, for which the whole PoE community is very thankful.